I don't know if there should be a FORCED tutorial, but a RECOMMENDED tutorial might be a very good idea.
People build units that they don't know how to use; other people build nothing but energy structures like fusions in their base, and no units.
I just watched a game where a guy built about 7-8 fusions right next to each other surrounded by a forest of windgens. On the other side of the map was his opponent, with a silo loaded with napalm missiles. It was essentially GG for the energy lover for 70% of the game, except for that Mr Silo didn't know how to fire his missile. Eventually when he did, he fired it at some llt's :D
I was in a game where another dude built the most impressive porcy base ever; bristling with turrets, AA, shields and a crowd of riot units. He had about 4 facs and 2 Singus. Problem: It was in a corner, he never fired a single shot at the enemy (unless it was by accident) despite everybody on the team BEGGING him for action, and the kicker: the singus were not even connected to the grid.
I have to agree with the thread starter that some basics on teamplay would be good.
Some things that could be covered:
1) Support the guys that run out to expand. Don't leave them to die alone while you build your fusion reactor
2) ... and WHY are you building a fusion as your first energy structure? Don't build expensive stuff right away.
3) Don't build 2 factories before the 10 minute mark
4) Do build an LLT and a radar next to your fac. That way a single flea won't demolish your base.
5) Connect the energy grid to the guy closest to you
6) BUILD UNITS and ATTACK with them. So what if you lose 20 Glaives? It's a game. You will learn. Don't be scared.
7) If you see lots of air units from different enemy players early, BUILD AA please
8) If you see lots of skirmishers, build riots
9) If the enemy builds lots of porc, build artillery. Unless it's Astran. Just avoid that noob's porc and go round it ;)
Hope I wasn't too pompous. :)