My main character is currently still wearing his VR12 Oblivion's Foe set, improved to legendary, and the regeneration set bonuses are set at 12 for magicka, stamina, and health. The values for the regeneration rates increase as the level of the item increases, and increases just a little more when improved.
As it stands, there are no scaled improvements (besides the armor value) to the Oblivion's Foe set beyond VR12. For example, the set bonuses are identical for a VR12 legendary piece and a VR14 legendary piece (the armor increase is almost negligible).
This can't be by design. It doesn't make any sense. Set bonuses are supposed to scale with improvement and level. Not to mention this is an 8-trait set -- I spent months keeping track of my research times because I thought it would *actually* pay off, in the long run.
Does this look right?