I know it will never happen, but I'd just plain prefer to see troop cards limited to multiplayer. Whenever I 5* a tough base in a war attack I'm happy about it...then think "they'll probably just figure I used a bunch of troop cards". Likewise, when my base gets levelled in a war attack, I wonder if they used troop cards or not. It's all just a bit detracting.
One other thing: I don't think we can say that they don't listen to players based on this particular community's comments. This forum probably equates to well below less than 1% of the player base. I have no idea what players request on other countries' forums or through support. I'd be happy not see another bought or event card again, but who knows...maybe more players purchase these things than don't, in which case the things should by all means be a part of the game. Rightly or wrongly, maybe new players feel the troop cards are the only way to roll with the big boys? It's got to take WAY longer to progress competitively from medieval age to Industrial Age and beyond than it did when I was medieval. More buildings get added, the university, additional library research...peer pressure.
Again, I don't know. I just sort of wonder if a player like myself is in fact a dinosaur...and not in the majority. If this were the case, then the game may be providing exactly what the majority of it's players want. If so, the question of whether all the additional content that may have created the perception of troop cards being a necessity is more salient than the issue of the damage/benefit of the troop cards themselves to the game.
When the the university was first introduced I thought the purpose was to slow the game down...a way to add content without constantly adding additional ages, and thereby keep a lid on the memory demands on devices playing the game and so extend the playability of the game in its incarnation at that time. Then atomic came out so I was wrong and I'm still trying to figure out the design intent of the university.