I bombed out of PF2 long before that, but I will say that I do believe you need more than one approach. 4e, prior to PH3, you only had feat-based multiclassing and it wasn't great except for that desire to just dip a toe into another class. But also having Hybrid classes allowed more flexibility. I dunno, I'm a fan of gestalt from 3rd UA, so Hybrid was great for me.
But level-based multiclassing systems don't really do it for me. First, there's the issue of "Well, I need 3 levels of X and 4 levels of Y to build the character I want" ... which, that's great, but the campaign only gets to level 6 and then collapses. Second, it does mean that most classes are designed to hide their core competencies so you can't just dip a single level into them. Third ... personal experience as a guy that mainly plays spellcasters (and Sorcerers) and started with 3.5 where the overriding rule was "Thou shalt not lose caster levels", it still feels like a trap even now with 5e.