I think Bratt would've stayed, Meier wouldn't have been acquired though, and I'd much rather have Meier.
Gaudreau will most likely pot more points, but Meier brings a much needed element to our top-6.
Gaudreau: season 681 games 1.00 P/GP TOI 19 min, playoffs: 42 games 0.79 P/GP TOI 19 min || 9.8M
Meier: season 472 games 0.70 P/GP TOI 17min, playoffs: 46 games 0.52 P/GP TOI 16 min || 8.8M
On paper it seems neither is a high value contract.
Neither can be seen as a playoff performer, since both drop in production compared to regular season, but even if you normalize the TOI Gaudreau would come on top in production. For CBJ better choice would probably be Gaudreau, for Devils Meier. Reasons should be obvious: other team needs a big name and maximum production while the other has specific need for physicality.