Yes, fixing the package builder is a priority, but it is quite a lot of work
(there are more things to fix than it looks like), so releasing Trisquel 8 is
an even higher priority. Here you can find some very nice sum up of the
meetings, that is usually updated on the road:
https://pad.riseup.net/p/trisquel-devmeeting
You also have a development mailing list. You can find it in the right pane
of the forum. It's nice because it has a very small amount of messages.
Regarding package-helpers, the ones missing can be found here:
https://trisquel.info/en/issues/23480
Cheers!