With gear, we definitely need to try it out for a while to see whether or not it's good for high level play. We are, of course, going to be seeing some sets of gear looking dominant over others, and i'm pretty interested to see what buffs are considered better than others. The biggest question we're gonna have to ask is: does gear improve the depth of play in a positive way? Even if one set is considered THE one to take, we should consider keeping it if it make the game more interesting. Ideally and hopefully, we'd be looking at a rather diverse set of choices for gear, with different buffs and bonuses likely being considered useful based on the loadout you're using.
Other questions: how long does it take to get high level gear, and how does obtaining it even work in the game? Are buffs/stats on gear randomized? Do you get a random set of choices to buy from daily? If things like this happen to be the case, gear is going to be really hard to standardize into a competitive meta, sad as it may be.
And this is honestly just considering online league type competition. Unless there's a relatively small amount of high level gear, and unless it's easy to obtain pretty quickly, offline tourneys just aren't going to be able to have gear legal. Which raises a final question: is it a good idea for online and offline play have different rules?
These are questions i'm excited to have answered!