Ran a heroic random yesterday with 3 people on my server, Prot paly, Arms War, Warlock, and Me. I really didn't feel like healing it and I wanted to get through it fast and since I greatly out gear the other 2 dps I figured this was the way to go. So we queue up for a heroic hoping to get a decent healer so I wouldn't have to kick them and heal myself. We end up randoming VP (easy dungeon) with a holy priest in 333/346 gear, cool I thought this might be ok.
Well first trash pull priest goes oom really fast, but we get through it with tanks CD's and me healing, second pull priest is OOM, I was like wtf? we're even banishing one of the targets and we burn one down pretty fast. So I look at their spell list and all I see is FH's/GH's a couple of PoMs and a couple of Renews... So the 3rd pull same thing, I go oom popping out of shadow to heal the tank (warrior died a lot during all of this). So my thinking is, if they can't even make it through at trash pack they sure in the heck won't make it through a boss fight
So what would you do? I thought about telling them now to heal, I even had it typed out that they should be using 1 renew and spamming the tank with heal chakara and serenity. But then I thought to myself, it's late at night I just want to get this done so I can go to bed and I shouldn't have to explain to an 85 priest how to heal. So I vote kicked them out and end up randoming a disc priest from another server who I had ran with before (i remembered them because they were decent in a recent GB and has a really funny guild name) and we ended up clearing the rest of the instance with no problem other then the second boss because they disc priest never been there before. But once I explained the best way to see/avoid twisters it was no problem (nice Blizz is addressing that on PTR)
Do you think it's bad taste to tell someone how to play? That was part of my other problem I didn't really want to offend them either. I am usually nice and patient with most pugs, and if it's just a minor thing like a good tip I will usually casually throw it out.