First of all the slow creep would be a big detriment for giants, much more so
than the occasional step out. A ranger has to spend the majority of his time in the wilderness, imagine how unsettling and downright annoying it would be if there was
permanent slowdown to speed. There are many ways to deal with creep effectiveness, there would be no way to deal with what you propose.

I find the other points you make too niche and maybe sort of elaborate for no clear benefit. Bearcharge on a giant is far from an 'i win button' as is, given that a lot of the classes in the game have means to be immune to it. The stealth/power tradeoff
is just about right in my opinion, and if ranger changes are to be made, i would rather see something that makes the class more fun to play regardless of race.

There are expertises that are too niche, and maybe should be removed and others that need more work as they feel unfinished/no longer suitable for the current in-game circumstances.