Tuanha, I believe the issue with the CR not using Holy Power efficiently while Holy Avenger active is the issue with Ret dps as well. Just noticed this while doing scenarios.
Divine Purpose doesn't have this issue, but it doesn't always take full advantage of DP procs either - yet it should.
The issue is:
Say the Ret has 2hp, they use a spell (CS, J, HoW) putting them at 5hp. The CR will often use another hp building spell...putting them at would be 8hp. The same goes for 3 and 4hp, it waists so much hp that could have been a game winning TV, or a life saving WoG. If the paladin has HA active, it needs to be implemented to use HP effeciently i.e. if pally has 3+ hp WHILE Holy Avenger is active, then use TV/WoG before another hp builder - so it's not wasting holy power.
The same goes for holy. If a paladin is using the HA talent, it needs to always take advantage of 3+ holy power before using another hp building spell. I currently only use Divine Purpose, or I'm very aware while using HA and spending holy power manually to avoid this.
Also, the Ret rotation will stop when Devotion Aura is casted (often only used during walling, or to let your healer free cast) and will start healing yourself as ret, at least that's what I saw. Same with bubble, while playing Ret I'm not necessarily bubbling just to stop and heal myself, I mean IF it's necessary (my healers OOM or has no CDs, or I'm super low then yeah maybe) otherwise keep wrecking kids. How often do you see a ret pally bubble/devo in raid then start healing themselves? Never.