I wasn't planning to...
(Almost) everything needed to make this a working Tileset is in the material Sen provided. (Yesterday I found a Tile model with some bush things with missing textures that I need to apply a brick to, but otherwise it's all there.)
The set, after all, isn't mine - not that that's stopped me doing all sorts of bizarre reskins of stuff in the past, but as for more or less straight replication of someone else's stuff, I'm not sure.
I suppose, IF a basic Hak version of Terria is wanted and if Sen has no current plans to do so, there's no reason I can't post it, (once I've completely finished checking that no more textureless bushes are hiding in abstruse crevices).
However, I'd want to talk to Sen first, to make certain there was no objection. Then maybe I'd put up a Hak with Sen's textures, plus non-overriding versions for Desert and Winter which I've more or less got done.
I don't know exactly what Rolo's plans are for associating it with the CTP "unfinished projects". That might include putting an actual Hak together...
I'll ask a few searching questions, but I don't really want to go being proprietorial about someone else's stuff... unless they tell me to.