I think they're fine. A lot of even the uncommons are playable in certain situations but not to be overpowering. Narset being the best uncommon for most formats is pretty clear, imo.
What I find curious about your initial statement is that you compared the uncommon walkers to uncommons of other sets, saying only narset is worth a couple bucks, with Ashiok and Saheeli being worth a buck, then mentioned,
Fatal Push,
Curious Obsession and
Light up the Stage. Why I find that curious is that you listed three uncommons from WAR worth over a dollar, but only one from each of Aether Revolt, Ixalan and one of the Ravs (I always get them mixed up in my head). Usually a set
might have one uncommon worth anything while it's in standard, and if it stays up its a really good uncommon (looking at you,
fatal push). This set currently has three planeswalkers at uncommon worth more than a dollar and I can think of one more that will be there (
Liliana's Triumph - who doesn't like
Diabolic Edict?) So potentially 4, and all 4 of those I can see retaining that roughly dollar to three dollar value even post rotation, since Narset is basically a god in all formats, saheeli has places and mill is fun to some people (and again, who doesn't like
Diabolic Edict,
now available in modern!) So yes, I feel like WotC did a good job with these walkers. They're unique, they, in general, fit the power level of their respective rarities and they have decent value (I actually expect a handful of the rare walkers to go up significantly in price as the years progress. They're good, but it's too early and the set was so heavily opened at the start that prices are low as people try to
recoup their investment.)