With the consolidation of Retribution talents (6 points eliminated) and the moving to baseline of Kings, Retribution has a lot of slack in its' PvE builds. As of the latest PTR your average DPS build leaves you with 11 or more points left over. This isn't a problem per se, but it is disappointing that however you spend those spare points the benefit you gain will be marginal in a raid setting. Essentially it's poor talent design, but hardly surprising to anyone familiar with the iterations Paladins have gone through over the last 4 years. A thread on the official forums outlining this, and Ret's low PTR DPS, elicited the following response from the Crabbed One.
One of the changes we are trying to do with Ret is to get them into the other trees a little more. This is definitely one of those specs where players would go 0/0/71 if we let them. I would not assume that trees with few talents are unfinished. The Prot warrior lost a lot of talents in LK, but it was a good change for them. Overall, our trees are probably too thick for lots of classes which makes it hard to spend many points in a second tree.
We do want to bring Ret's damage up a little, and we would like to get more talents in the other trees that they actually want to take.
Ironically you can't spend 71pts in the 3.1 Ret tree, there is only space for 66 talents (and that includes Deflection and Eye for an Eye).
So, where should Ret spend it's spare points? Well, there's Divine Strength, but that's about it. Any additional point investment is of marginal value at best, totally useless at worst. Ret may as well spend 61s point and not use the rest, they'll never be of any raid value. The problem is that unlike most Hybrids Tier 1-4 Holy and Prot are very focused on either PvP or thier respective roles of Healing and Tanking. Ret by contrast has something for everyone.
There's no easy way to fix it, and I'm not sure that Blizzard are really that invested in addressing it at this stage. Ret, Prot and Holy remaining viable in their primary role is the big thing and messing around with Tiers 1-4 Prot (as this would be the tree likely to see the changes) without a clear purpose runs the risk of interfering with Tankadins too much. Apart from taking a long look at the three 11pt talents the time and scope of potential changes is probably too much. Some mechanic changes made earlier could provide a simple out: moving Aura Mastery to 11pt Prot and Imp. Devo Aura down a tier would allow Ret to spend points to give the raid a tangible benefit (a 40 yrd aura with +3% damage, +3% haste and +6% healing). Unfortunately that's not really a solution, just a fudge for now which makes Tier4 Prot look decidedly sparse.
If I were a betting man, I'd say that no more significant changes to Paladins will be made before 3.1, and making Retributions' talent point investment beyond the 60th meaningful will remain aspirational rather than a priority. That's not to say that 3.1 is a let-down, all of the changes bar those that resulted in reduced DPS have been very good ones. You can only spend your time once and Blizz has other things it needs to address, not least some of the inconsistencies and bugs in current Paladin talents.
With a presumptive deadline of the Noble Garden holiday (April 12th, the 7th being the Tuesday before this) for 3.1 Blizzard need to hop like a bunny to address what GC mentioned. Hopefully we'll see a new PTR build tomorrow or early next week, but apart from the odd DPS-increasing tweak and Tier 8 Set Bonus' there's probably not much new to come for Paladins specifically.