A couple of things I find repetitive and dull about adventures
1. Sending troops. It takes ages to get all your troops over there since you can only currently use your Generals to do it (as far as I know). This is bad enough on the small ones that need a few hundred, but the big ones that need thousands this becomes boring. The Expeditions got a special extra troop transporter, why can't the Adventures have one. Or better yet, just let us specify how many of each we want to send and send them en masse in the same way they come back at the end (up to the limit of how many we've got, of course). Basically, keep the fight limits on generals, but lose the transport limit.
2. Generals walking around the adventure map. I know this is used to time blocks and other such time/troop-saving stuff, but it gets repetitive after a while - especially if the boss is a long way from the border you are using. Once you have your general(s) in motion, some kind of fight Fast Forward/Results would help. Obviously, you risk the unexpected interruption by doing this (which you might have been able to retreat from if you are watching it), but that's the risk you'd take.