A lot of pull requests are lost when a branch is frozen and no more pull request are accepted for that branch:
@dreamsxin closed most of those pull requests and didn't rebase the branches. I can understand why he did it, it's a little bit depressing when you open a pull request, wait for it to get merged or at least commented, then have to rebase it and reopen another.
In his repo robmorgan (https://github.com/robmorgan/phinx) has a solution that could be applied to phalcon: create a branch named 1.3.x (and 2.0.x) where pull request can be made and aren't lost until a new major version is released. Tags are created from this branch and there isn't a need anymore for version branches (like 1.3.1, 1.3.4, etc).
As of now (!) pull request seems to be the only "development" made to the project, so it's a shame to lose all the contributions when you create a new branch.
@phalcon what do you think?