It would be nice if winning an Event gave you the Option to choose from different small PERMANENT prizes- say,
1) Ten more Wall sections
2) Another Fruit tree
3) Another mine
4) An additional trap
5) Another house
6) 4 more defenders from the forest
7) 10% boost in attack to (one) troop type
8) 10% boost in hitpoints to (one) troop type
9) An extra farm
10) An extra caravan
11) Decorative Buildings, Trees, or Animations
12) Extra animal Spawning
13) Multi-use Blessings
14) Additional SPECIALTY GENERALS
15) Extra slot for mercenaries
16) 5 Extra spaces for troops
17) An extra slot for Tactics
18) A 10% reduction in Build time for 1 troop type
19) Ten extra road segments
20) 10% extra Cavalry Defenders
21) 10% extra Garrison Defenders
22) 10% Hitpoints boost to (one) building type
23) A specialty troop type
24) An extra Air asset
25) An extra Air-Defense building