As the £10 goodybags and above include unlimited texts and minutes the rollover idea should work really well, buy a goodybag once and you have texts and minutes for life - somehow I think not!
Rollover data is suggested at least once a week so best to pop over to the Labs and support on of the ideas already there .
As far as the name change goes @shabazmoqsud
I do recall many months ago Alex_w mentioning in the announcements thread that this had proven more difficult than expected, and that the process used to change the names of a small number of new members was not viable to be opened up for existing members.
I also recall seeing I believe a post in the same thread saying that no further development time would be invested in the project unless its priority changed.
Nor do I believe the problems to relate to the community platform but to giffgaffs own systems so I don't believe the move to Vanilla will change anything - but that is just my understanding.
So I don't think anything will happen anytime soon.