The actual attack team (including heros and troops used), is very important. Seeing the def team from the team that raided you is ONLY useful if you are going to revenge them. Knowing WHO attacked you, to better work on your defense team (or to learn different strategies against a team similar to yours, both what worked and did not work), can only be learned by seeing who attacked you and won, or lost.
Not asking for a full play back (but that would be VERY cool), just a way to see the starting line up.
SAME could be said about wars. Having some way to see the team that attacked, and failed to kill you, or that attacked your good team and ‘one shot’ you, would be very helpful.