It's definitely more a move to give him a second chance over how everything unfolded - and lingering good will following his one purple patch - 29 in 36 in 11/12 - but for a club that's just been promoted its a ridiculous move. There's better choices out there even if, as United are, they're struggling for goals (right back Kieron Freeman is second top scorer for them this season and the only other player with 10 goals. Leon Clarke, a striker, has 9).
There's definitely better options though, even if United just poach from the relegated teams from the Championship. Danny Ward's scored 9 in 36 for Rotherham which isn't a great record but its recent goals in the Championship, which is something Evans has never done. Danny Graham has 11 in 26 which isn't bad either and if Birmingham goes down they could probably pick up Che Adams, who looks a decent prospect at 20 years old.
Oh, and loans and stuff obviously. Sam Gallagher (formerly of Argyle!) on loan at Blackburn from Southampton has like 11 goals in 30 games or something and it's likely he'll find himself back on loan in the Championship next season.