Hey Sitra, just found out about TemplePlus this morning and felt the need to come by and say thanks. I haven't touched ToEE in years, but I'm excited to see what finds its way into the game over the coming months and years! Amazing work!
Factotum was the first thing that came to mind when I read that adding classes is now possible. ^_^ You're probably correct that most of the flexibility that makes the class so appealing is lost without all the social aspects of play, but the upshot is that in a single-player setting you can take the time to formulate plans and co-ordinate the party's actions, and the factotum play pattern really shows off this strength. Plus, if the class is added early, factotum fans get to anticipate buffs in every update as spells, items, and maybe even expanded uses for skill checks get added. They really do interact with everything (assuming Font of Inspiration is implemented...)
I didn't mean to run on about the factotum, but if I've understood correctly with Temple Plus it's now trivial to roll up a party of any level. I can't see myself ever having the time or interest to create a complete campaign (the IWD project is mind-boggling,) but I could see the fun in setting up shorter level-specific scenarios and single-room encounters (I find 1st level one-offs insipid.) I'd guess most of the ToEE player-base are probably looking for longer adventures, but if ToEE as a 3.5 combat simulator and this "vignette" style of downloadable quest takes off I honestly think the factotum would be a pretty good fit for the game (consider an encounter geared for up to three 15th level PCs, with an emphasis on stealth: your goal is to extract an artifact from the third sub-level of a cultic enclave, and multiple combats will almost certainly lead to a TPK. Two PRC-x/rogues and a factotum start sounding pretty good, right?) On a related note, I can't wait to try out the ToB classes!
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I can see myself being talked into learning how to add the factotum myself in about two months.
In any case, thanks for all the hard work, Sitra Achara!