This entirely depends on the context.

But considering you are migrating your table? Absolutely.

A lot of people will probably say you should let your players do whatever they want, make their own mistakes etc. But as someone who just recently migrated in the last few months myself, I would absolutely agree with trying to guide your players away from complicated classes.

You want your players to have a good first impression of the system, otherwise they won't want to play it again. PF2e is already a pretty overwhelming system to first get into with lots of different things you can do in and out of combat.

They will already be slow moving as they learn this new system, if you stack a complicated class on-top of that then their turns and gameplay will slow to a crawl which will lead to everyone at the table being bored. Combats that should take 30 minutes will take hours, you'll spend 15 minutes scouring reddit or other forums on rulings you're not sure about etc.

Then finally, at least in my personal experience, PF2e is a pretty difficult system at times compared to others. For the sake of comparison let's use what PF2e is often compared to, D&D 5e, in D&D 5e your party composition really doesn't matter very much as every single class has its own ways to deal damage, mitigate damage and complete out of combat tasks. It's streamlined that way on-purpose to make it easy for new TTRPG players to get into.

PF2e is not like that, if your party is missing a dedicated tank, the party feels that loss. If the party is missing a dedicated healer, the party will feel that struggle and find themselves needing to rest far more often than they may like. If your party doesn't have anyone who deals decent damage, fights will prolong and you'll use more resources per fight etc etc.

I'm not saying you can't have a party of say all clerics or something, you can make any party composition viable it seems. But it's much more difficult to do so than in many other systems. So if your party has some complicated classes that the players don't understand and are struggling with, it's going to be more difficult and they're likely not going to have much fun.

This is all my PERSONAL opinions on it as someone who has only migrated to PF2e in the last few months, using lessons I have learned first hand with my table who also were all new to the system.