Yes, but that is not catch up field. Imagine guys playing many hours to catch up to pvp with players which are already in BW +6 or A grade sets, top runes, buff slots, enchanted weapons, some epics. Neither of what you have described is not working towards gaining a significant advantage for 70+.
Also, leveling wise. New buffs is huge advantage for top players 80+. What is the locations tops level? GC, correct. Can catch up players stay in GC with good exp? No, they need to catch up with the gear so we are at point one again. At least before you leveled Kariks to 75 so people could level up without GC required gear. Nothing exists now to fill the gap.
The second PvP event with many times running. It does have a bit sophisticated mechanics. Many guys I asked didn't get it. I guess a bit better explanation is required. Some pics and text on forum won't do, too old school, little coverage. IMHO though.