I already entered my list elsewhere, so I'll only comment on what's here.
General comment : If an ability or demigod is strong, don't usually water it down. Add counter-measures and bring other demigods up to par.
Note to devs : I read somewhere that each demigod costs 100,000$ to make. As it is, Sedna Oak and Erebus are going overboard. Just a waste.
Also, I don't see any way around postponing release date. You can't say "buy now, we'll fix it later". There are just too many issues right now, including critical ones, that should be brought at least close to optimal in final beta some 2 weeks before release. Patches should address minor glitches and then mainly promote balance and diversity ( like, un-kill dead features such as SCFA's Brick and SCU ) through the first year.
Ok, so :
Death : Bring back some of the interaction, not all. Some denial adds to the drama. But allow information like HP of structures and a look at current abilities and citadel upgrades so a plyayer can plan some, so death "gives you time to think things over".
Stuns : Leave it be. They are powerful but short and it requires team skill to chain them and skill should be rewarded.
Add slow counter-measures, agree. Slows are common and relatively prolonged. But if so, add some damage to Regulus.
Teleports : Again, leave be. Tripple teleport requires coordination and resources and should be rewarded. Legit tactic.
Totem of Revelation : The cost is the slot occupied. At least double range.
Rook health : Leave be. Against a skilled ranged-demigod player the Rook will have his challenge. Perhaps have speed buffs and debuffs affect him only half ( say due to his size ), I would hate to see a Boots of Speed and Ankled Rook chasing me.
Regulus Snipe : I don't understand the problem.
Oak is terrible at low levels and stays that way. Generals must have powerful auras, that's the correct way to fix them. Plus specific enhancements to some abilities to reward activity rather than have them just hang around and dodge assassins.
Erebus needs quite an overhaul. For example, his bat skill would naturally be used for temporary retreat, so no point of having it damage anything in its path ... and his bite is much inferior to AoE and ranged abilities despite being 0 range and single target. All of his abilities are just plain useless.
UB : leave be. If anything, he might require a buff a few weeks after release - melee demigod with no defenses.