Personally, I'd prefer to see an alpha for 1.30 than another 1.29 bugfix, but if you think that doing one would be a productive use of your time (and perhaps help you out of the burnout?), then go ahead.
Would it be possible to merge some of the new stuff for 1.30 into the 1.29.x branch? As an example, merge the building management stuff into the old branch, which would allow us to test the process of management, even if it has no relationship to anything else in the game at this point.