Payload maps just totally suck, I can't name one single payload map that I like. In fact it's worse than that, I utterly detest them! Worse still, I use a Valve variable that enables me to speed-up the respawn times whilst not making them instant respawn. You'll notice this on lazy_f and lazy_rc1, there's a delay but it's only a few seconds or so. Instant respawn can be a bit much on many maps and I understand the reasons why there's this 'delay' built in but I can at least tweak that delay so that it's not too noticeable but still not instant.
Well, Valve in their infinite wisdom have disabled that particular cvar on pl maps. The result is respawn times of anything upto 20 seconds. My only solution is either instant respawn or using a 3rd party mod to tweak the times, neither of which is ideal. I've no idea why they did this as the faster (but not instant) respawns work well and are balanced based on the Valve variables where teams get rewarded or penalised depending on how well they are doing.
Anyway, I hate pl maps.
I've tried them and better tried them but just hate them. Sorry.