If you ascend your troops once in a while, it really is not a big problem you go through it once, then never again (unless you don't do it for months). Later on no more than few troops at a time can be ascended, it honestly isn't a huge effort.
"Open all keys" could be useful, for gold keys .. only, pretty much. And even there it also isn't a chore taking up half of your day (to open 2000 gold keys you have to open 40 "packs", this was a lot more of a "problem" pre-2.1 when guilds got A LOT more keys than now).
From the "wow this change would make my life so much easier" perspective , I think being able to chose how many levels you want to "level up" at once for your troop, would be a lot more handy. (i.e. you're trying to get 5-stars on a kingdom, working with limited supply of souls, you want to lvl 5 troops to lvl 15-16, but you only can click "max lvl" (which is 18-20 and eats up a lot of souls for those 3-4 extra lvls) or click those 15 lvls one by one to use your souls in an optimal way).
yeah, they should turn off the multi-troop-per-click for a while, so people start appreciating it more after it's up again. Clicking 100 times to ascend a common to mythic - now THAT was annoying. Being able to just click 10 times to do the same thing is awesome. (also if you have more than just 26 copies of a troop, the 25 also fills with 3 clicks - though I am not clear on what the "breakpoints" are- for the amount of troops owned vs how many are filled per click).