In regards to the long engineer rant...learn to play.
A couple of ubered soldiers/demos can DESTROY turrets with ease. Snipers can take them out in a few charged shots (4/5 shooting a charged shot all together will kill a lvl3 instantly) Sap and stab is quick enough if you use Q. Also if you move slowly and cautiously (and get close, from behind) to a sentry as a heavy you can smash it to pieces before it gets a shot off.
A level ONE turret dies in a couple of pistol/shotgun shots from any class at all. if it's getting 2 kills off, and you know it's there, you...suck :s
uh...okay.
so first off, you need two medics, charging, VERY VERY SLOWLY because after all, we're at the start of the stage, people (keeping in mind anyways that this needs to be a team of all people who play together regularly enough to deal with it). so that's one strategy that isn't very likely and is incredibly time consuming in a stage where you only have a few minutes to get to the first control point.
okay, then you have to magically get a charged shot on a sentry while not getting killed by the dudes running around anyways (and I've never, EVER, seen a charged shot kill a level 3) or shot by the sentry you're aiming at because after all there is not enough distance to get the kill from a safe place.
edit: I just reread your idea. FIVE SNIPERS. sweet that's feasible as hell. five snipers all charging and of course no enemies will be attacking.
then there's the fact that you ignored the engineer
turning around constantly in order to hit ANYONE who comes near.
then there is your magical heavy somehow SURVIVING enough to get around there.
and then you ignored that I said if you DON'T KNOW it's there you are pretty much dead.
and then there's the fact that very few of these strategies are usuable in something like 2forts, where you have to somehow bring four people into the enemy base just to kill a single sentry turret.
congrats you listed a bunch of viable strategies that are either stupid or impossible to implement in the stage I mentioned, and then capped it off with a "heh...learn to play". it's not like I can magically get the team to somehow focus enough to kill something that's already got like five fucking kills in the initial rush,
which was my point. yes, turrets are beatable.
no, they are not fair, especially when your strategies involve complex four man teams or snipers destroying poorly placed turrets that you can get longrange without being torn to shreds, just to deal with ONE.
ps I wish I could remember this stage BUTTTT, here's an ascii art of what i mean maybe it will help.
|
____
| |o | o
|e |====
| |d___|
o is a turret, e is engineer, d is dispenser. obviously not that spaced out. the gaps on the left are exit points, all sloped DOWNHILL, and the engineer's on top of a building that you can't hit without exiting the point.
engineers are easily the most overpowered class in most gameplay situations, and the only way to counter them is these ridiculous strategies like the above or a team of all scouts or something. this should not be so unbalanced! if you have a team that is working cohesively together, yeah, it's doable, but not only does that ignore the fact the defense can have a team working just as cohesively (as the team I was playing against proved, prioritizing medics for kills so that they couldn't ubercharge), but it also dissuades anyone who wants to actually develop a strategy with a small unit of people they are familiar with instead of this huge affairs!
I'm not great at the game (it's on my roommate's computer, and he uses a fucking TRACKBALL) but I think when you've got a character that can set up pretty much instakills if they put it in a dark corner, with no real reprecussion other than MY PRECIOUS RESOURCES (the engineer also starts with 200 FUCKING RESOURCES so he can actually upgrade any surviving turret or just build a new one), you've got a balance issue!
once again, the fact that it can be beaten doesn't mean it's fair.
tl, dr version: you shouldn't need a four man team to destroy something another character drops and that can tear you up like a cheesecloth if you don't know where it is.