UPDATE: please see an update post for updated info on this – come build 19041 the info below will not be valid
This blog post was inspired by @Perculia, Warlady of data at WoWHead, tweeting on how legacy enchants are looking to be very good for her rogue in 6.0.2
There are also changes thanks to stat priority changes – the following is written for Shadow priests who now have a priority of Multistrike > Int > Crit > Versatility > Haste > Mastery – see this thread on How2Priest for more details.
Before reading on, please be aware that since this blog post was published @WatcherDev has posted that the older enchants / foods / flasks / potions / etc being better than their Mists equivalents is likely a bug and should be resolved soon.
I have to admit that I was slightly suspicious of the peerless stats giving so many stats, but in a way it doesn’t surprise me that others have issues as well.
The values used in the table below are their post-squish values, as taken from the 19005 beta build. The stat weights from the How2Priest post linked to above are:
| Multistrike | 6.63 |
| Int | 6.58 |
| Crit | 6.14 |
| Versatility | 5.98 |
| Haste | 5.89 |
| Mastery | 5.66 |
Based on the above:
| Slot | Enchant today | Likely enchant in 6.0.2 |
|---|---|---|
| Weapon | Jade Spirit +103 spell power proc |
No change |
| Whilst on the surface the Wrath-era Black Magic enchant is better, with it’s +125 haste proc, there is no bad luck prevention for it. Jade spirit is on the new RPPM system and overall it should have a better uptime of its +103 int | ||
| Boots | Pandaren’s Step +9 mastery and movement speed increase |
Surefooted +10 crit, +10 haste |
| 10 crit and 10 haste easily beats +9 mastery, even with the movement speed increase.
This is a Burning Crusade-era enchant |
||
| Wrist | Super Intellect +12 int |
Superior spellpower +15 spell power |
| Something of a close one here, but as intellect no longer seems to increase crit strike chance, this pulls ahead.
This is a Wrath-era enchant. |
||
| Chest | Glorious Stats +5 to all stats |
Peerless Stats +16 to all stats |
| Note that the +16 stats above is from the current beta and feels like a bug – its not a tooltip error either, it really gives you +16 stats.
If this makes it live then it’ll be Peerless Stats which is a Cata-era enchant. |
||
| Back | Superior Intellect +12 Int |
Greater Critical Strike +13 crit |
| Something of a moot point as my priest currently uses the tailoring perk Lightweave embroidery which is going away! So +crit it is; a Cata-era enchant | ||
| Gloves | Superior Haste +11 haste |
Precise Strikes +15 crit |
| This a TBC-era enchant & surprisingly one which my enchanter doesn’t know – looks like I need to get ARL installed again! | ||
| Off hand | Major Intellect +11 Int |
No change |
| Unfortunately whilst Greater Intellect does give +13 intellect, it can only be used on shields! No use for my shadow priests, although shaman and paladins may like this! | ||
| Legs | Greater Cerulean Spellthread +19 int, +11 crit |
No change |
| Whilst tailoring doesn’t change, if you use leatherworking leg enchants going back to Cataclysm versions | ||
Sivation's musings about WoW... and cooking 
only thing I can see is there may be tool tip errors that have been data mined or not implemented yet
That is always a possiblity, but in this case they feel like bugs / similar.
Since I found that peerless stats really does give you +15 stats. And black magic really did give you +125 haste when it proced.
… I’m glad that one of the chars I poked on the beta was my enchanter who has lots of recipes & a nice stash of enchanting mats set aside to play with!
Now I am kicking myself for listening to the advice to sell. I may have some stuff left but most is gone
Well, from comments made by @WatcherDev its possible they’ll look at this since needing to use older enchants over Mists ones is a bit nuts!
Its not just enchants as well – its flasks, potions and food as well.
well just dropped about 300g buying up mats to stockpile in case, if its true I will make it back easy tomorrow