Udyr minor mobility buff (some slow resist in bear form)
So my suggestion would be to give his bear form a bit of slow resist not much just like 10%. Which would be fitting. Since when are bears deterred by a bit of mud. they can plow through any terrain. Reasoning: udyr was built for a playing field void of iceborn gauntlet and the plethora of active slows that are now present in the game. His kit is from an antiquated era. Now sure you could say that about most champs however his gap closer is far more effected by these than other champions who can dash/hop etc.
Keep in mind udyr has no ultimate per say. So his regular spells need to have it incorporated in them. So it'd be like having a bit of slow resist where as say a master yi can have slow immunity, and an olaf cc invulnerability. While less potent, the advantage is that you have it throughout the game as opposed to every minute.
which probably always has these 2 items
I dont sell my boots, fk me right?
I run aorund the map with a near perpetually ~600 movement speed
I've grown really fond of high speed travelling junglers cuz my team needs their junger everywhere 24/7
I feel like experimenting with speedier but squishier Udyr builds since I've noticed I dont take alot of damage anyway