Regarding extractions, Lazlo and myself both had this treatment, and we both agree the tongue feels more cramped after extractions, even after jaw surgery.
The problem is this: you likely need extractions because of a narrow arch that can't fit all the teeth safely in the bone. The discrepancy is probably something like 4mm. Well, when you pull a premolar, which is about 8mm, you then have to close that space -- pulling all the teeth back and in. That's 16mm of excess space to close now on each side, which is twice the space you needed to fit all the teeth. So the arch narrows more, and the front teeth come back and in. Anterior molars will not move forward at all due to their massive root structure. If they could, that would help alleviate the problem.
This is why braces/widening needs to be done when young and bones are malleable.