Here's one thing that pisses me off in #Battletech: upon making contact, the remainder of your lance loses their sprint round, splitting it in two, if you're not fast enough to advance them blindly before the cutoff. Reloads galore b/c of this.
Another thing that pisses me off massively in #Battletech: all too often, line-of-sight arc/move indicators are blatantly lying, resulting in wasted moves (esp. when trying to max evasion chevrons). Again, reloads galore. Makes the prospect of an ironman run entirely unappealing.