Udyr changes in general

Why do you guys from the balance team almost always feel like taking something away when buffing Udyr? Example: When reverting back that nerf to phoenix stance, a nerf that made phoenix unplayable, you felt like reducing the aura by 1 second. (And didnt revert the base damage nerfs to the aura).
Now if i'm remembering correctly the recent changes on pbe, you are planning to buff the duration on bear stance in the early levels and to nerf the w shield by another 20 hp at level 5. The e buff is amazing and im really glad you did it, but I honestly don't see the point in these little nerfs thrown there, do you really think Udyr would be too strong if you didnt add these nerf? Besides, trinity doesn't even give ap anymore so his w shield is consideraby weaker than it used to be. Imo even if you reverted all the nerfs you did in the runic echoes era Udyr wouldnt be as problematic as he was back then, since most of the items he abused got tuned down. I would like if anyone could give me their opinion on the matter, and tanks for reading.