I have lots of experience with getting full requests so let me give you reasons for waiting and not waiting.
Not waiting:
You may get a response on a full request tomorrow. Or it may take a year. I'd say the average is 3 months (my average may be closer to 6 months; when I used Query Tracker, I was often the longest wait). Some people report getting no response on a full, but I've never had that when the reason wasn't that the agent dropped out of agenting.
And when you do get a response, you may not get anything helpful out of it. My rejections on the first novel that got a lot of requests were all, "Great concept but..." and then something pretty generic.
Meanwhile you could be sending out queries. That also could take a year to get a response. So now, if you've waited let's say 3 months for those fulls to come back and then send out queries that could also sit in inboxes for months on end, and you're extending out the already excruciating query process.
Plus, it's a little easier to handle that wait on fulls if your inbox is still active.
Waiting:
If you have many requests already, it may be worth waiting. Obviously your query is working, so you don't have to worry about that. You'll probably get more requests in the future if these fulls all come back rejections.
Sometimes there's something wrong with an ms that just isn't clear from the query and first pages. Agents *may* give feedback or even request R&Rs. If you agree with these suggested changes once they're suggested to you, you can make them and then you still have a huge pool of agents to query once you've made the changes. It's easy to get into the mindset of, "Well, I think I probably should make that change, but what's the point when I've queried everyone already and there are 6 other fulls out there with the old version?" And then even when you find a great new agent to query, it's just one agent, so you're not going to revise for just one query. Even when it becomes another a while later. And another during a #pitmad contest. Or whatever happens. If you have a bunch of fulls, it's more likely you will get some sort of feedback. And even if all you're getting is, "Great concept, but..." and a generic reason for rejection ("it doesn't fit my list right now," "I'm not the right agent for it," "I don't know how to market it," etc.), that's still telling you something about the novel. If you start off with a good pool of requests, it may be worth it to hold off on querying any more, even though the wait can be excruciating.