How much - if any - grief did Janeway catch for negotiating with the Borg?
It consistently makes people's "worst things Janeway ever did" lists. Other consistent entries include "stranding her crew in the first place", "killing Tuvix", "going nuts with the Equinox", "destroying the timeline in 'Endgame'", and "not promoting Harry Kim".
Alternately, you want to lock these people up, before they get back to the DQ and use all the weird alien tech they found in the DQ to annihilate Cardassia Prime as retaliation for those spoonheads cleaning out the Badlands.
The Dominion pretty much did that already.
The Maquis members that became part of Voyager's crew were likely granted amnesty.
The Maquis is dead. Cardassia is broken. The Federation government will at most let them off with a slap on the wrist and more likely allow them to retain their Starfleet commissions.