I'd tend to agree, Terrace felt undertuned to our crew as well.
It might be worth noting though, that due to the release schedule and the fact that since it's 6 bosses, mooost guilds spent at least 2 weeks on HoF prior to entering ToES. Given that most guilds would have been clearing all other downed content, plus all 5 LFRs by the time that 2nd week rolled around, you're looking at the largest possible potential ilvl gain across the raid in any given time period between raid releases up until then. Since ToES isnt an ilvl up from HoF in terms of gear, you could make the arguement that they're designed to be equivalent difficulty. Consequently, part of the reason ToES felt easier was that most guilds went into ToES around 5 ilvl points higher on average(with access to LFR-based 2 and even 4-piece bonuses), which in the grand scheme of things is quite a boost.
I just pulled that entire paragraph out of my butt
Random observation, we did R/A/K for our elite mode and found that relly easy, plus you get to use Corrupter Waters throughout phase 2 for the DPS buff and have the raid just stack in the middle, which = easymode.