Hi! Here are a couple suggestions I have, taken from the AoE2 experience:
- Unit pathing (although that one looks as if it is already fixed)
- Troop formations (as long as it isn’t the old scatter around, cuz that was frustrating)
- Advanced troop formations (some cool tricks in AoE2 like dodging catapult shots by clicking the flank formation)
- Higher ground advantage (creates some unique depth in higher elo games)
The first two are definitely a priority to myself, since they are more of quality of life features, rather than anything else.
The last two are just some things that could help give the game some depth. Also, if you do implement these last two, it would be amazing if you made those features obvious (like an “Advanced Mechanics” tutorial or something, without, of course, over-emphasising them, so newer players don’t get lost, at the same time, in such non-obligatory details) so newer players could also get to use them earlier on (that is, don’t make them hidden! please).