I wasn't sure if this was in X-Wing, as well, but in TIE Figther I really like the ability to boost my weapons capacity at a sacrifice to my current shield strength and vice versa. Adds that extra little decision that could mean winning or losing.
There was also that one mission where one of the secret objectives was to catch a totally-not-the-Millennium-Falcon-honestly YT1300 fleeing at surprisingly high speed while filled with “rebel officers” — unless you managed your engine and ion cannon power perfectly, you had no chance in hell of ever catching up and disabling the ship before it was gone.