Gonna address these one at a time with my comments.

Patch 2.28 to be released in May.
Sounds about right.

Additional housing areas to be added in 2.3.
Right on!

There has been many requests for increasing the number of furniture that can be placed within housing. However, due to server stress, this will not be possible for now.
I heard Yoshi say that. It makes sense, though I do hope SE finds a way to optimize their servers for housing somehow.

Personal rooms within FC housing will be slightly larger in size compared to the inn rooms found in the 3 cities.Other players may enter your room (permission may be turned on/off). Not yet determined whether to allow people to go straight to their room from outside (front door).
That's not a bad size for personal rooms. Permissions for rooms is good. I think there should be an option, absolutely, to enter a specific room in the house.

Personal housing will require a lv50 character and achieving a certain rank within a Grand Company. Will be implemented once personal rooms are ready or slightly after. May possibly be delayed until 2.35.
I see, so that means either you'll need to be Second Lieutenant or they'll be increasing the Grand Company rank cap in 2.3/2.35. Either way, it's fascinating! I've already been collecting Flame furniture for my personal room.

Other PvP related adjustments will also be made in 2.28 and 2.3. All PvP skills will be unlocked from the start and will become reset-able freely (to encourage more participation). No words yet as to what will happen to the existing skill reset items.
That will definitely make PVP much more accessible, because right now, it is kind of a pain in the ass with how PVP is set up, in the kind of "Race to Kill the Opposing Healer" sort of way it is right now, which definitely puts Scholars in a league far above White Mages. With the base skills unlocked, that would certainly make things easier.

New PvP mode Frontlines will be implemented in 2.3. Will be more friendly to newcomers due to the larger participant count. Will not necessarily be 8vs8vs8 (but still 3 teams). Designed to be 24+ man content.
Goodness, that does sound impressive! Frightening if there's no strategy, but certainly impressive!

Limit Break appearance will be changed to match the user's job (effect will remain same?) (no words yet on when this will be. Assume still in planning stage)
Haha, yeah... I always found it funny that my Monk could use Sword Techniques as Limit Breaks and that Dragoons can use Final Heaven. Doesn't make much sense there.

Number of Allagan Tomestone of Mythology that can be obtained from contents will be increased in 2.28 and/or 2.3.
I assume to levels that Allagan Tomestones of Philosophy were obtained at from content before Philo got cycled out.

Next chapter of Crystal Tower coming with 2.3. Will have many contents that should make old school FF fans happy.
That does have me really, really excited! Especially since this will be the first actual time we'll be setting foot inside the Crystal Tower proper, contrary to what most players believe.

Chocobo related new contents coming in 2.3 or 2.35 (Ability to craft chocobo food that can be fed to your chocobo that will allow it to reach even higher buddy ranks(?).
May also allow chocobo training at stables. Possibly allow dyeing your chocobo).
Excellent! I'm really excited about these additions!

In the process of testing 2-person mounts.
Interesting. Not sure the point, really, but still interesting.

New contents that can be done with less than 4 people will be introduced.
Considering how this game seems to very firmly adhere to the 2-1-1 role ratio, I am curious as to how that's going to work.

Finalizing designs on marriage system (not coming in 2.3) (get married at the big church in east shroud). Wedding dress for brides will have semi transparent parts and flowing movement. should look great.
Wedding rings will be created for married couples. Discarding the rings will "divorce" them (lol).
This has me deeply concerned about how gender will play a factor in a marriage system. Because unfortunately, as much as I wish it weren't true, society still isn't yet at a point where same-sex marriages are looked on as being equivalent to opposite-sex marriages. Because of that, if this marriage system focuses exclusively on opposite-sex marriages, there is going to be an outcry from the LGBT community. Conversely, if both same-sex and opposite-sex marriages are permitted, there is going to be an outcry from the Traditional Marriages camp. It's a very, very slippery slope to introduce a marriage system at this point and I only hope SE knows what they're getting into in either direction they decide to take it in.

Work on Dx11 version to continue after the world media tour. Aim to release before year end.
PS4 operates on DX11 right now and by the TWELVE is it pretty!

Big plans for beast tribe contents related to Goblins. Still pretty far off for now.
Looking forward to it!