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No, it isn't. There is no verse equal going on. His powers are bestowed by a deity that is willing to forcefully take them away if needed, and said deity backs up his enslavement. As long as someone can't break fate manip, they can't break Han's enslavement regardless of tier and abilities they have.
IDs are not made for individuals under Gaia's influence, if they were transcendent like Harem King and Arc Company couldn't use them, which would be a massive problem (tough, the latter can make his own dimensions, admittedly). ID is specified to be a spatial manipulation spell. They borrow Gaia's power, and use it as a battleground more often than not, but it can be used however one wishes beyond that.
There is no verse equalization going on at all. Well, there is, but not due to SBA but due to Han's power, as they automatically warp reality to "gamify" things, as Seeker described it. You seem to be misunderstanding the mechanics of Han's powers. IDs aren't verse specific, and non-supernaturals and those completely unaffected by Gaia can use them. Enslavement is not a verse thing either, it's Han's power saying that anyone that doesn't transcend fate will be forcefully subdued by Gaia's fate manip. Kind of like how "mana" as far as he is concerned is: ki, mental energy, negative dimension energy, soul energy, soul fire energy, and many more. Another example is how fool's act paralyzes the enemy. It's so dumb looking that the enemy is dumbfounded, regardless of the fact that no massively hypersonic would be shocked for several seconds, because his powers say so.
See above. It's not verse equal, it's simply how his powers work. Han's IDs are specifically the exception to the rule, being actual physical pocketdimensions, as opposed to illusory realities. Wheater Gaia constantly empowers him, or she simply slapped the power onto him and left him as is is unknown, so it's also unknown if she maintains his stuff. Spatial Manipulation is not something you can put a tier on.
There are tier 6 gods in verse, their spatial manip is still inferior to the High 7-C
Seeker. Unless he actually overcame pocket dimension that resist being broken out of, that is that.
I'm guessing you stopped at season 1? Because he stopped getting help, and was the main fighter after that. He just does everything in his power to not get close range with the enemy unless needed. And for the matter, yes there is someone else to help him. He has hundreds of golems, and his elemental too.
Well, that depends on what changes will be made. Until then, things don't really change.
Stat amps>Speed Equal