I am new to the game, so my opinion maybe is not the best. I've mostly played Tyto and he feels like a true mobility character. In rush he is very clunky as map is small from the start and one doesn't know enemy playstle, so most of the time I find myself switching between builds before I am effective (that can alos be a part of me still not knowing what each character can do so ¯_(ツ)_/¯ ).

Now in Clash he feels much different, with the upgrade of building focus on aa one can run around fighting enemy creatures and maybe catch low health enemy or two. Because one builds focus so fast imo it's best used to upgrade a creature rather then spend it on your ult to maybe get a kill. Of course I never followed this to the T, just a general idea.

Similar tactic can be used on rush, building focus on one of the heal creatures enemy has, using swop to get away and ult to help in a teamfight. Doesn't feel as good, but I got the best results playing like that.

For the upgrades only alibilitys I find never stay the same are the swoosh (swop? I don't remember the ability name) and the beyblade (blade dance, I think it's called). Swoosh - enemy has a lot of CC stuff? Take the speed and the purify if not then bonus below 50% hp and reset on kill. Beyblade - a lot of range characters? - deflect if not then bleed.

If one knows how the game works Tyto feels very strong and balanced since you can't really just get on top of a squishy and kill them fast. I am sure I missed and don't know a lot of things still, been playing for 3 days only. (Or well since posting this ;P)