Most top players in faf use lots of hotkeys, as is the case with all rts games. However even though faf has tons of different possible hotkey binds you can use they end up being unusable for 1 simple reason: The lack of keys on your keyboard to assign hotkeys to. This is especially noticeable in faf because unlike other rts games there currently isn't (fully) a system in place to work around this issue.
Let me take Aoe2 (and sc2 to a lesser extent) as an example. Aoe2 has, just like faf, a lot of different hotkeys to work with. However In Aoe2 you have the ability to overload hotkeys which drastically improves the efficiency of using your keys to bind hotkeys to. You have a worker selected? Press D to make a stable. You have a stable selected? Press D to make a knight. You have a unit selected? Press D to make them go into defensive stance. Meanwhile on faf you assign D to dive your t1 subs and now the D-key is completely unusable for anything else.
Let me try to emphasize just how bad this is.
A UEF land fac has 20 possible units it can make. Just assigning hotkeys to those units already takes up every single letter key that's in a realistic range of your hand. You are somewhat spared by the current hotbuilding key binds that are currently available by being able to merge land/air/navy & build hotkeys together, but at this point you've only covered the basic hotkeys and already lost 20 keys. General unit commands like move, attack, patrol, stop, assist, reclaim, capture and repair need to be added too. Then you have tons of other often used hotkeys too like drop (from trans), OC, pause, repeat, launch tml, etc, etc. At this point i have only touched the more common hotkeys and haven't even begun assigning them for unit abilities, selection or other features.
As mentioned earlier there is already somewhat of a solution to this issue and that is the current hotkey combination list under hotbuilding. Although it isn't perfect, if it would be possible to add whatever combination of hotkeys to any button(s) you want it would already be a lot better than the current situation.
So what i'm envisioning is a mod with some sort of template that allows people that have no understanding of coding to easily adjust a few values to construct their own hotkey combination. For example You should be able to assign dive, drop, launch tml and enable/disable shields all to a single hotkey. What i think is most important is that there should be some sort of extensive instruction file in the mod for how to properly use it.
If anyone has a different idea or solution that's viable feel free to share it.
All in all the mod should allow of better competitive play since a better hotkey setup allows for more possibilities.