I don’t have a way to respond to that without sounding a little more negative than I want to be. It boils down to be making the worst kind of argument, “The novelty will wear off so it doesn’t matter”. I don’t wholeheartedly believe in that.
I’ve always wanted a commons-only mode, or maybe a monthly rotation of 100 troops, etc. Limitations breed creativity, but the novelty always wears off. So there needs to be a lot of churn in the choices.
But there also have to be choices. When your event criteria excludes all but 8 troops, there’s not much of a teambuilding challenge there.
All I ever see in these forums are people whining about something. This restriction is good in my opinion, it’s an incentive to use troops that may otherwise be overlooked.
Also, disenchant your troops!