Reboot, or "reset" as Feige has coined it the past year, all semantics until we know the full extent after SW.
Tony Stark and Steve Rogers will be recast. So having a potential mixture of old and new faces is a definite possibility. Also not having (that I'm aware of) concrete contract commitments from Hemsworth or Holland going forward can logically leave the door open for a more extensive reboot ("reset").
Like I said, the soft reset approach is the safer option for the executives and is done more so for their benefit than it is for creative exploration. They would be hedging their bets somewhat against a wholly new creation not being able to stand on its own two feet and compete with the past iteration of the MCU.
As a fan I want a fully new creative endeavor, not a mishmash of new with the older greatest hits.