As a result I think you're misunderstanding what the orbital dynamics would be.
I do understand what geostationary orbit is.
The commenter I was responding to said "any other satellite who is travelling from one orbit to the other can stop off on-route for no fuel or time cost". If they wanted to only talk about geo sats they should have said that.
But sure, let's think about using a geo sat to fly this intercept. Let's just pick Echostar-8 as a concrete example. It is at 6.4 degree inclination while Echostart-7 is at 1.5 degree. So you will at best have a glancing blow between these two.