If I have a $180 LEAP and I sell a $180 (or above) call closer in time as a covered call, then there is no margin requirement. It's covered by the LEAP or any other call option that is at least as long out and at or lower strike. And while it might technically be considered call spread or calendar spread or what not you ARE selling a covered call (i.e. it has some backing and doesn't require margin hence the term covered).
So I have a lot of Jan 15 $200 LEAPs. Half are covered to make delayed construct spreads, the other half are open. Since its less than a year till they expire, what would the benefit be to covering these calls, as described, at higher strikes as opposed to just selling and rebuying the same strike calls? I assume the benefit, if they were further than a year out , would be long term capital gains. Another benefit might be that you don't have to try to time the tops and bottoms as the shorter term covered call will hopefully just expire. Any other reasons?