Pretty upset myself, because not having access to basic combat resources is a bit laughable, especially if they want to be able to pull off any sort of challenging PvE content in the later Adventure Zones.
From my understanding the API that they had available was nowhere near as robust as many other MMOs and it was already limited in what it could do. The modders that created addons like @atropos that created FTC at tamrielfoundry.com basically added the missing BASIC information from the UI that most people are used to in every other available MMO on the maket. Cast Bars, buff/debuff tracking, health/magicka/stamina tracking, damage input/output tracking, DPS/HPS tracking, and all farily minimized. Most called this unfair, because they didn't want to download an add-on, but honestly it should have been something that was built into the base UI and from talking to players at TF it actually was built in a long long time ago, but was gutted after a slew of complaints from TES purists.
Now not all of the information has been stripped. From what @atropos reports the API lost the ability to utilize cast bars, buff tracking under 30 seconds and debuff tracking. As well as damage input from enemies and healing input from players. Not sure where these things really give anyone an unfair advantage if they did what they should have done and made this innately available to EVERYONE in a bloody combat log on your chat log...
I've been an avid raider for many years and I can tell you from a PvE aspect it's critical to progression to see what killed you or what did x damage to you. This sort of information is what forms sound strategies and helps you overcome an ecounter.
Example: If you tank gets hit for 2000 damage from a mob unmitigated and and dies during a certain mechanic he can then deduce that he should need to pop a Cooldown or re-evaluate his gear / skill choices to improved his EH "effective health" to survive the hit.
Example: Raid gets hit by an unavoidable AoE that healers need to be ready to heal at a specific time to ensure the raid doesn't die. Knowing that the dot ticks for X damage and how fast will allow the healers to time and appropriately select their heals to conserve magicka and avoid a potential raid wipe.
Those are two pretty common things that people look at in death logs or damage taken to see what's hitting them or whom. Also being able to record this data and export to a site to further evaluate who got hit by what, what did the most damage to the raid, what different types of damage were there and who was more prone to them (melee/Ranged) are all things that help raid leaders effectively evaluate an encounter and push progression.
Now we don't know if Adventure Zones are going to bring this level of Depth to PvE as other MMOs have and I quite frankly hope it does, but I don't see them being able to execute some of the encounters if the basic combat information is not available for raiders to evaluate.
Also I know this was very PvEcentric, but most of this can be applied to PvP in a round about sense. The same general rules apply.
Just my 2 cents.
» Edited on: 2014-03-22 05:40:04