Not giving me much to go on here
Personally, I think very little was missing. The quest was a labor of love by a dev who really wanted it to shine and knew orcs. So they put in every bit of lore and tid bits they could, reviving the Kosharg perfectly. They revived many clans, established new leaders, had follow ups on clans that may be defunct or stayed loyal to the Burning Legion, showcasing the few who look to reclaim their title for the Horde and orc people.
The Kosharg itself was probably the best route they could have gone. Not only was it a major cultural festival for the orcs on dreanor, but has been a yearly event on many RP servers recreating it to the best they could. For the story is incredibly important to show a diaspora people reclaiming their roots and embracing their ways and cultural traditions.
What was missing was the playable/AU Magâhar, the ones from WoD we picked up (for some contrived reason ). This quest was all about finding the orcs national identity and self again and they did a phenomenal job. However, they relied heavily on existing MU characters/elders, which is completely fine, who remember the old days and old ways, but have not been actively a part of them for 30+ years. They are going off of a very dated memory, no matter how good their memory is. The AU Magâhar were living these traditions up until very recently, until they were forced to Azeroth. The clan structures, while disrupted, were recent memory even for the younger orcs. Geyaârah, who is suppose to be basically an AU Thrall, grew up in Dreanor orcish culture. She knows what the Kosharg is, she knows how each clan (or at least her own) lived, ate, what special traditions they had, etc. She doesnât need to rely on Drekâthar, who was too old to travel, and Etrig to put this together based off of their, again, 30+ year old memory. Sheâs, theoretically, younger than their memories of the Kosharg while still going to it until like 5-10 years ago!
All that is to say - it was a small plot hole/miss that the AU clans did not show up to the MU orc heritage armor and revival of the Kosharg to help rebirth the many clan cultures, traditions, and histories.
Only other thing that was missing for me, and this is only a game play critique, is some of the armor aesthetics. The red armor set doesnât match up very well to any of the Arathi Warfront/PvP sets which were super traditional orcy. The nipple spike is a little funny but its grown on me as a comical addition. The Frostwolf set doesnât match the same blue as the Frostwolf tabard you can get form AV (although they kinda still go together and there is an updated WoD one) and/or they didnât introduce a number of tabards to coincide with the armor sets or flags. We never got a Blackrock tabard, for example, but we have their flag. Similarly there is no red Warsong tabard, to go with the red âWarsongâ armor set but the black Warsong tabard from WSG is available. Super tiny things like that. Branding is important!