Hello dear Intrepid Studios,
I've been following the development for quite a while and I'm really hyped to play your game.
Here is a little thought from me.
The combat system is the key to success, why? Because most of the time you're busy fighting (for my part, at least ^^).
So, the fight has to feel rewarding, crisp and sharp you have to cite, manage your resources etc...
And every class has to have its strengths and weaknesses very important, so that you really have the feeling of uniqueness and usefulness.
For me there is only one game in the MMORPG genre that has made it right to the point and that is World of Warcraft (Classic; TBC; WOTLK)! I've tried many MMOs that also had a very good combat system but never got close to WoW.
That's just my opinion, everyone can have different preferences...

To a happy and exciting new year (without covid?!)^^