I'd assume he's only going to be on a fraction of the states' ballots. He's already missed some deadlines.
Exactly my thoughts:
He still has time to get on the ballot in 24 states and in Washington, D.C., but the deadline to file in seven of those states is Wednesday.
That's a lot of work to do in that time frame (signatures, etc).
So, yeah, it's an impact, but much less than if he'd made moves earlier.