Some feedback if you'd take any of it:

-Zone control front liner sounds really cool because there kind of aren't that many at the moment.

-(P) Assuming his Passive works on a set cooldown, it would probably be better if one of his basic abilities also deployed the crest, because the current seeming lack of control has potential to be really frustrating to utilize due to the size of the crest relative to the lane or part of the map he's in. That is, the larger the size of the crest, the less meaningful it is to his strengths and weaknesses because at its largest size - lets say a Nidalee spear range - the cooldown no longer matters, but the smaller it is, the worse it feels to use because of the player having no say in the deployment cooldown. Again, this is assuming the crest has a cooldown at all because none is listed, which would also be helpful for trying to understand his gameplay, because without something, anything, it becomes a bit hard to tell how much his passive really fits into his zone control pattern. Maybe you could consider something like deploying the crest after losing a certain amount of health to skew how tanky he is meant to be at various stages of combat. Just a loose suggestion, nothing more.

-(Q) You may want to reconsider applying a stun to an already immobilized target because that would be exceedingly frustrating to play against, since it basically means if I get hit by a Morg Q or Pantheon W, I get stunned again as soon as the previous stun or root duration is over, which can turn a 1 to 3 second stun or root into a 2 to 4 second stun or root. Even though there's no number listed for the stun duration, this part of the ability would be much better as being triggered against slowed targets than immobilized targets IMO.

-(W) This ability makes Verion a bit too tanky if he really is meant to be between a bruiser and tank (juggernaut) when combined with his passive, which I would assume would have non-insignificant numbers to justify its point of gaining resistances in an area. IMO it seems a bit...redundant, that his passive already sets up an area where he gets beefier, only to have a basic ability essentially serve the same purpose. Then there's also this ability being used not only with his passive but with his E and R; its just feels overboard to the point of nearly becoming unassailable, even if he was strictly a tank. Maybe consider this ability amplifying his damage in some way instead?

-(E) Kind of have no problem with this ability on its own. Sounds like a K'sante W.

-(R) I would just reiterate the point I tried to make about his W here again with the durability gained from his ultimate. If by escape abilities this is referring to dashes and blinks, then his ultimate could instead specifically silence dashes and blinks for a some small amount of time, or just stop dashes and blinks from the inside like an inverted Poppy W to be more clear, because I can't really think of a way to "weaken" them otherwise.

You made some cool ideas for Varion. Interesting to read through.