I think adding the older portraits and titles as an additional feat to GCs is an excellent idea and said so awhile back. GCs were marketed on the idea of being able to use your entire roster, but in all honesty there is currently no incentive to do so outside of whatever earns you the full team feat and the no deaths feat. Reintroducing the older feats with portraits and titles at least gives you some variety to the feats which so far are rather lackluster in their variety.
Note: I am advocating these as additional optional feats for GCs that in no way replace the current rewards.