User blog comment:YourPrivateNightmare/Ewwwww, it's got the nerfs!/@comment-4636093-20140512095135/@comment-5331854-20140513152738

The main problem is that you cannot blindly put points into Udyr when he levels. From the beginning, you have to know what your team needs. That does not only decides if you go 5-5-5-3 or 5-5-4-4 (although Udyr is rarely needed for wide versatility), but also decides your main damage tool: Either Tiger or Phoenix.

Both primary damage skills have their pros and cons. Since I don't really play Udyr, I cannot tell you the fine differences between both styles. Generally and with broad strokes, Tiger is for 1v1 ganking while Phoenix is for early camp clear and teamfights.