Crystal Tower has to go

[kaynide]

This is also easily solved by making the final raid of a series a requirement for MSQ progression. This will get players such as yourself into those raids, and make more of them available to all players in the queue with you should you choose to use the roulette.

When you think about it, SE exacerbated this issue the moment they made CT a requirement for MSQ progression as that damn tower became such an integral part towards the story. And now they have done the same thing with Mhach. Orbonne and Paradigm will also need to eventually follow suit. Easily done with Ivalice and eventually Aglaia, but I honestly have no idea how they could integrate YoRHa into the story.

In any case, player's unwillingness to unlock content is not a viable reason to continuously reduce the number of instances available to the players. Otherwise there is no point to having the alliance raid roulette.

A solid no thanks on required MSQ progression. Especially because they are generally side stories/FanFiction (Ivalice; Nier I especially want to believe the canon is that it was all just a fever dream of the character).
Aside from experiencing the story on my main, I have zero interest in ever doing any of the raids again. Just not my thing. No hate on people who like them.

As is, there's no reason for a new player to do the raids aside from the story itself since the gear is largely useless.

IMO, the easiest thing to do would be the following:
1) Decrease the iLVL sync for CT to be where the mechanics matter (fights take longer), but not so much that there will be wipes (mechanics deal less damage?). Just enough to show that Raids have a little more oomph, but not enough to scare people off.
2) Buff XP given in roulettes based on the expansion; something like CT giving what it does, 3.0 giving +20%, 4.0 +40%, 5.0 +60%. I would be very happy doing Nier for +60% XP.
3) Make it so if you leave the instance because you got what you didn't want, you forfeit that roulette for the day entirely. All or none. (This would avoid the inevitable that we saw with Castrom/Prae where people dip out to get more XP)