Something I was thinking about a week or two ago...
People don't like TC because it stalemates. People don't like ADCTF because of instacap (before people made blocking).
What if you combined these? Meridian is a CTF TC, but it is traditional CTF where you need to get in and back out, and can still stalemate at times. What if you did one that was invade, taking your flag to the enemy. Could possibly work with one or two flags. (did you ever try those, shmitz? if you are reading)
It wouldn't go over well. The thing people don't like about ADCTF isn't the insta-cap, but that the insta-cap only has to happen
once. There is no "lesson learned, they won't get through again". There's no switching up strategy to counter what the enemy just did. Once the enemy succeeds, that's it, it's over, and the map moves on.
With the traditional CTF setup, teams at least have a chance to react.
Incidentally, Icarus, your list of what hydro's spawn times should be is very close to what I ended up doing with meridian, because yeah, once spawn times hit instant it became nearly impossible to get to the flag. You could take out a sentry or two and they'd both be back up five seconds later.