Which basically describes Walker if you swap quickness for speed.From what I've seen, AWB is a monster defensive player - good positioning and truly special quickness and tackling ability to shut down good wing players in space. But I'm not convinced that he's all that good going forward. Maybe I just haven't seen him enough.
AWB has only the one season but he seems to be a heck of a player. I doubt anyone who signs him at that price will regret it.
In my view Palace should be holding out for more, again, at the top level there are precious few homegrown players who can actually play on a really good top 4/CL contender team. The roster restrictions can get tight, which is why a complete mediocrity like Fabian Delph has been able to stay at City.