Effect of Patch 4.0 on model editing mpqs

[Elementroar]

Does anyone know whether the new patch (on the PTR and en route this Tues maintainence, supposedly), is going to effect how custom .mpqs are applied? I'm removing all my custom .mpqs when the patch is applied, but I'm wondering if it'll be safe to put them back in after the patch.

PS: The ones I'm using are mostly just reskins. But I'm wondering if the new patch would do anything to prevent custom mpqs from being run.

[Arid]

All old patches WILL NOT WORK. The models are getting a major update. To merge animations such as Hold rifle. Now you move your legs stay still. In Cata/4.0.1 your legs will move. It's a hexidermal thing from what I understand. May be wrong

[Elementroar]

Ah okay, just needed a confirmation that it's best not to use any custom mpqs after the new patch is applied. I'll be checking out the new developments it brings to model editing then, and hope those mpqs can be updated to work post-4.0