I do expect the 'squishy' characters to hang back out of melee, but I also expect them to be doing something, or at least be setting up future actions.
What I mean is that you didn't respond to the situation. You just reported that you noticed what the others were doing, and that doesn't move the story forward.
I expect something along the lines of "The kid on the fox seems to be getting out of the way. I watch where he goes and join him if it seems safe." or "The big guy joins the line formed by the militia. I stay back and watch to see if any goblins slip past them." or even "While the militia deals with the goblins I start organizing the civilian types to put out the fires in the goblin free areas."
Also, I don't mind a bit of cooperative metagame. The party hasn't been formed yet, but you can set up something to move us that way. "Wow, that 1/2 is really smashing the goblins. I'll buy him an ale later.... Oh, there's fellow wee folk caster sniping goblins. We should talk shop later..."