I completely support that.
We used Rubric in GT because we wanted to get the tools ready for Pharo 3.0 and for early feedback in Pharo 4.0. Rubric is just a nice makeup of the old TextMorph and it allows for finer grained programmatic support, but it is clearly not the future.
We have to focus on TxText. We are now in an Innovator's Dilemma situation: TxText does not have all the bells and whistles that Rubric has, but its foundation is dramatically better (objects all the way down, screaming performance, vector graphics). We have to judge TxText by its potential, not by its current state. Igor et co. has done a fantastic job, and we have to embrace this and support their effort.
Cheers,
Doru