PSST,
No problem with questions. Hope the answers are what you wanted to hear.
Stylewriter printing is never that quick and I did find it awfully slow and that was even just in B&W. It evetually got too slow for me, doing excel spreadsheets and some bitmap images, that I went out and bought a USB HP DeskJet.
I kept the Stylewriter connected to my IIci, so it had something to print on, for another 3 years (until my ink cartidge stash ran out), before giving it away.
You "should" be OK with an OS9 configuration with TCP/IP over Airport and AppleTalk over Ethernet. At worst though, I do remember something about AppleTalk needing to be on for TCP/IP in OS9, so you may need a TCP/IP and AppleTalk over Airport configuration, and a AppleTalk over Ethernet configuration, using Location Manager to quickly switch between the two.
There's also something nagging away at the back of my mind, about certain LocalTalk printers that won't work with this proposed setup. I think several models of LocalTalk printer could only be used by plugging them into a Mac and then connecting that Mac onto the Ethernet / LocalTalk adapter - a sort of System 7 Printer Sharing setup. If I could find some formal documentation for the adapter, I'm sure it would explain it exactly.