So, a major problem I have with archetypes is the ability score requirements (I can be a full-power Wizard with 10 Intelligence, but I can't dabble in wizardry unless I'm a genius?), and a major problem I've seen other people mention is that you can only take class feats of half your level. I think we can solve both issues by removing the ability score requirements, and replacing the "Basic X" and "Advanced X" feats with the following:
Multiclass Feat (Archetype)
Prerequisites: [Class] Dedication
Gain a [Class] feat. For the purposes of qualifying for the feat taken this way, your effective [Class] level is equal to half your level plus your [Ability] modifier, to a maximum of your level -2.
Special: You can select this feat multiple times. Each time you select it, you gain a new [Class] feat.
This way, if you really want to dig into your multiclass's high level feats, you'll need to shore up your multiclass's primary ability score... but if you just want to dabble a bit, you don't have to worry about it too much.
I like this idea, but shouldn't the dedication feat stay level 2?
This doesn't modify the dedication feat at all, it just has it as a prerequisite, so I'm not sure what you mean by that.
Just to be clear, this doesn't alter the level at which you can take the archetype feats, it only alters the level at which you can take the actual class feats of the class you're multiclassed into.
The Basic X and Advanced X are so that you don't just get the multiclass feat at later levels and just jump right into the good stuff. Basic+Advanced gives your character a form of progression through the multiclass.
Hmm, I hadn't thought of that. If that's an issue then, this could just modify the Advanced X feat, instead of replacing both.