it's huge advantage - hopefully it will never change
We have no plans to change this anywhere in the future.
is it planned, to connect the exchange account with the support account? actually i can't log in with my exchange account.
The support section and the exchange itself are on seperate servers. If you want to open a support ticket, you need to register on the support section. It's a completely seperated platform.
I've did this on purpose in case of account hacks, server load etc.