I'm honestly too lazy to check if this has been discussed, but it would greatly help to have some sort of a shortcut that turns on combat.
Playing a melee-based character, I have no recourse to avoid first-attack by a ranged character (A-key only works if I run up to them). Also, I prefer the original turn-based combat method, and, admittedly, it often helps to have control over the moment when hostilities ensue. Without the ability to begin combat when I wish
without resorting to immediate attack I am often unable to use tactics against my opponents, which is all the more important for close-range based characters.
Another benefit would be "cooling down" potential aggressor - I had several player characters run up to me and use burst weapons from up close before I could even type in a warning to stay away. Since attacking anybody I see on sight is not my playing preference, being able to go into combat mode also allows me to indicate that, yes, I know my potential opponent is there, and, yes, I am prepared for a confrontation. Especially if the combat is turn-based, and I have the bloody time to type
This option would have to include a timeout period before re-use to avoid it being a constant abuse issue, although if it is code-able the counter should only be set if it is used in combat with another player present.
If used in town, it should be treated as an actual attack (possibly modified by reputation) to avoid exploits and general asshattery.
Random encounters are a bit of a different issue, since they often feature mixed NPC presence. A solution might be something based on reputation modifying the reaction, or simply black-or-white approach between the reaction as described for town guards or ignoring initiating combat mode.
Frankly, it is simply something to help deal with other players, so PvE considerations are not an overly high priority (though it would be nice as an option).
Thoughts and comments very welcome.