So 5.2.x or 5.3 should have JSR 330? Don't worry about CDI, getting more synergies out of that for Java EE I aim at helping some of the other frameworks (from Matt's survey[?]) first and foremost JSF, since it is official part of the JCP like those JSRs, too.
Where applicable, all interested EE frameworks should get involved with EE7 at an early stage. Early enough to "tame the beast" before it grows too big for that [?]