The Mythic sets for Trial of Valor should not return in Legion Remix unless all previous challenge mode and mage tower appearances return as well.
It required you to complete the Trial of Valor raid without dying or zoning out at all and rewarded you with the mythic variant of The Chosen Dead set. This means you could not die on a boss, die to trash, log out for too long, or leave the instance. If you did you would lose your buff, and your attempt would be null and void.
The MoP and WoD challenge modes could be easily completed with a group of 4-5 people. Tanks could do absurd damage keeping up with or beating dps which meant you could carry an extra dps and still time gold. There were a plethora of skips that were available back then that have been fixed since which meant you could skip many annoying parts of dungeons and kill smaller easier enemies instead of troublesome ones or just skip right to bosses bypassing a ton of trash. Even with all of this there was still the gear scaling which people would argue made it challenging but no you had the option to just farm the BiS items from all raids over the course of the expansion and they may be even more powerful than they were at their base item level after being scaled down due to the content being designed around the lower ilvl.
This is like if in Legion you could wear Draught of Souls and Convergence of Fate in 7.3.0 Mythic+ and they did the same damage as they did 2 tiers ago. I would say challenge modes were the equivalent of doing a +10 or +12 in Season 2 of The War Within where yea I guess it’s challenging but the equivalent of completing The Chosen is like 2 chesting a +16 if you had to coordinate with 4 groups at once instead of just 1 and you had 1 chance to do it a week.
The level of coordination you needed and the amount of things that could ruin your run in Trial of Valor made it so much more difficult than challenge modes. Most challenge modes could be completed in under 20 minutes with decent gear and enough brains to hit a defensive and you could retry again if you messed it up. But with Trial of Valor, you needed 20 geared and skillful players who knew how to not kill their teammates or let them die from no dispels or wipe the raid from not doing mechanics and many days or weeks planning before doing a Chosen run with tons of prog and learning pulls and wipes, so you know the fights before you do The Chosen. And if you did die or wipe during a Chosen run you or your entire raid team would have to wait an entire week to try again. Most people would have to wait a week because everyone in their raid team would be locked to the instance after killing Odyn and you couldn’t regain the Test of The Chosen buff that you get at the start. There was the option to pug the raid with someone else’s lockout but because it was mythic and not heroic there were slim chances that you would complete the raid without dying in a pug group.
Based on Wowheads data which could be inaccurate because many players may not be actively playing still, The Chosen achievement was earned by only 5% of the total player population at the time as opposed to the Challenge mode gold achievements for MoP and WoD which was earned by a around 10% of players at the time which is double the amount of players who achieved The Chosen.
If so few active players have the MoP and Wod Challenge mode sets and weapons and they have never been available since, why should a set that is 2x rarer than those be available to anyone who is willing to kill the equivalent of an LFR raid in remix?
Why should the mage tower appearances not be available while The Chosen is? They were 100x easier to complete because you could do them with gear that out scaled the content
There needs to be a line drawn. If The Chosen is added to be obtainable by anyone now, then all exclusive content from years ago should be as well.
Make it all available or make none of it available.
You only make players more upset when you pick and choose which prestigious thing that took hours and hours of game time and preparation and coordination with others to achieve will be made available to anyone who can click the complete button on a quest.
There needs to be sense in the decisions that are made for these rewards, and I see none.