Have mines changed significantly since the last time Engineer 1 (shotty) was Available? I haven’t played in this new build yet, but there wasn’t much a complaint about them before, and the mines always had a bit of a delay when stepped on. I know this because I’m primarily engineer and would watch people walk over my mines and make it around a corner before they exploded.
Self arming is fine, I think. They’re pretty damn noticeable (or were, I’ll have to jump in an active server to verify) and there was a slight delay before exploding.
My only suggestion otherwise would be having the mine explode after whoever stepped on it then stepped off – thus giving an engineer a chance to disarm it.
I wonder if this is more of a “We’re not used to Shotty / Mine Engineer because it’s been out of the rotation for a while, that it now seems overpowered because we aren’t used to dealing with it” than a “Mines are OP” kind of deal.