Broke open my copy of Block and Mega Mania, then read a bit about it on Boardgamegeek... For some curious reason, I think I skipped this back in the day (have a copy now, but think that was ebayed?). Certainly remember playing it back in the day, but not tht often... I feel that we probably lent it from my cousins friend who was also big into 2000AD at the time. GW were churning out so much other stuff, 2000AD or otherwise, that I might not have prioritised it - Sorry Tharg!
Anyway, while I am een to try to play games as intended, the Happy Hour stuff seems slightly scarey balance wise (when an 80s game is warning you at the time of balance issues...!).
This seems easily fixable - let each block draw randomly from one of the secret weapons (Thermo Bombx2, Plasti-crete Virus, Nerve Gas). They may forego their CP roll result to place the weapon in their armoury (thus allowing a poor roll to be used for something quite powerful instead).
The only other thing that sounds super swingy is the CP roll... I'm tempted to try to do something about that using Happy Hour as well - Every block begins with the Jaeger squad and draw three more random (rather than 4 random).
CP is still a 2D6 roll, but you can never go over 12 CP in any one round, even with the use of Mania cards).
When you lose a Jaeger Squad, your CP maximum drops by 2 and for each Citi Def you lose your CP max drops by 1 (so if all 4 of your CitiDef are killed and your Jeager, then the max CP you can get is 6) - you can use some of the weirdly blank tiles from the happy Hour sheet to show that, or put your dead CitiDeffers onto the CP tracker (though they might be too big?)
Going to try this out with my daughter later this week to see how it goes - she loves Dungeonquest, so swingy is not a problem...