Returning player questions

Good day everyone.

After about 6 years I've returned.
I've played a lot in C1-2-3. When GoD released I played for a few days and sinked about 30 euro's in it. Got bored quickly though.

I was really upset how the current state of the classes were, it used to be 21(ish?) different classes. Now it's like 7?. I'm just wondering, nowadays I read "Feoh soultaker" "Feoh Mystic muse" etc.
So my question is:

Is there a difference in the different Feoh's/Wynn's etc? Or do they have the same skills? I thought the only difference were the racials?

Any other tips for a returning player? Is it worth it? If so, which server? I have about 1 bil on Naia, but I saw Chronos has almost double the population.. Should I switch to there?

Every class within the same archetype has almost all the skills in common, but the devs made an effort to differentiate each through the use of passives or defining skills (such as cubics for the elven tanks).
Naia is populated, it just has its ups and downs due to the population being split among different timezones.

There are now subtle differences in each of the class archetypes. it really is just about min/max imo now.

i too recently came back, on chronos 1 bill might get you a set of high r grade armor or a +3 weapon now.