They are fine . My max loss is 16k on the combo. I only left 10k of excess liquidity in the account.You in the states? at the moment i'm forced with IB because of my nationality, but if you are able to use ToS, it's a great platform. You can try at as a second option.
Not that IB is bad, they are a powerful institutional level broker. All brokers do that sweeps, specially in low margin accounts (RH for example does it in great scale probably for the profile of a great number of their users), IB in my case have never done it, they even don't let me close covered positions that I just want to close for neatness (when I just don't want the assignment/exercise crossing on losing positions, probably they don't let me close even at full strike width price to save me some on commisions).
Also take in consideration that us using IB didn't have even a small hiccup these past days when ToS was a hot mess.
Would portfolio margin vs regular T make any difference ?