I would like something which includes bigger synths for EXPing crafter classes.
I'm a CRP35 (only god knows how I got there xD ) and I'm dieing with the Standard-Spamming EXPing.

SE already mentioned that they implement crafting boats with like more than 1 crafter. So you can work together to build that up. Why not just make "parts" of the boat on your own. Like log in, work on the "part" for about 15mins, get 25% EXP from your level and you'll have to wait 24hours to work on that boat part again.

Since crafting partly means a gil sink as well, you can make that "boat part" use like 3x99 Stacks of some Lumber to compensate the "easyness" of the craft.
There can still be the option to spam standard synth for exping incase the "DoH onry" people can do their thing.

In terms of "casual" play it's totally the opposite from what we have with leves. You can log in, do 4 leves, get exp and log off. Everything's done in 30mins-1hour.
If I'm logging in and want to XP my crafting class it's like... I'm doing 10 crafts got like 5% of my EXP Bar and log off. Inclusive some insanity granted in 30mins of spamming standard synthesis =D

The number are just guessed. Long story short, exping a craft is pure numbness and not fun! Of course there's people which find that fun, I'm not the one though.