Marketplace Submission Process too slow!

Indeed.

If others like Unity and Apple can approve marketplace assets quickly then Epic Games can to. Unity can be a bigger Company and Apple is a giant in the business indeed but it doesn’t mean that Epic Games can continue to be so slow for a very long time.
They will end up losing customers… less game developers using UE4 for developing games and less developers of marketplace assets… That is something that must not happen unless Epic Games wanted to quit the market completely and sell everything to competitors and such. And this along with UE4 needing an overall better APIs documentation too and critical bugs fixed immediately whenever is needed and so on. Epic Games must step up and fix issues before it is too late.