The problem is most of the community are 50s now. In a MMO you have the newbs and the "can't make up my mind yet" crowd that allows you to generally find a party at all level ranges.
1) There are very few newbs joining the game(just came across one recently to my surprise).
2) Most have already leveled multiple jobs to 50ish which is why you don't see a party until around 30+
The fact on how many buttons you have to press is hardly the issue. The game is much better to play compared to before(and going to be much better tomorrow) but that doesn't change the issue FFXIV still have.
The lack of people playing.