Sorry, but you really cannot compare championship Palace with PL Brighton. The two divisions warrant different styles even Townsend seems to put in a shift for them (BTW, I did like gravity whore)....... A lot of our players looked world beaters at that level too. We are playing in the toughest league in the world and it requires different demands.
Although we lost at Spurs, the 80 yard criticism goes back to my only concern regarding how deep we dropped. Ryan, Dunk and Duffy needed to push everyone up 10 yards higher, but as you alluded, the game has changed and although we have wingers, they are still in a team and need to do a dual job IMO. If they can't do it, then they need to go.
And maybe this is the crux of the problem, whether the emphasis is on defence or attack. You'll never win a game if you don't score but you can win a game if you concede a goal (you just have to score more). I'm not saying we go into games against the top six with all out attack but it seems from reports that all the coaching was about emphasising defence and not attack. Where we let ourselves down was in the home games against all the teams around us at the foot of the table.
With regard to wingers, I see their prime role as creators and tracking back, whilst important, is secondary. Others appear to see it as the other way around. It's a bit like having Murray on the pitch and saying he's there because he helps defend corners!!!