@afonsolage agreed 
I think both libs can coexist for different purposes, I am even trying to use the TTF one in a non standard, non expected way :).
Just set a milestone goals list, do not embrace all the world (all possibilities) at once :).
Release something usable as “version 1” (it may even receive contributions and tips/code review).
So basically it seems you have an older version that is usable what would be cool already, may be we just should avoid extending it as you may probably change it a lot. At my console commands project, I change it SO MUCH, it got so completely differently structured and named classes… hehe… just tell ppl not to extend it, but use it “as expected”
Later on, If your lib requires too much redesign to accommodate all the extras you would like, release the new changes as “version 2” therefore incompatible with “version 1”, so end users would required to adapt their code when upgrading.