Doubling the thrust is likely overall a bad idea, for the reasons you mention.

Also looking at other posts in this discussion, it seems the 4-engine option (4x 150kN class size engines to provide about same overall thrust) was discarded because the asymmetrical thrust in case an engine gives out at a critical moment (takeoff, say) would mean that the plane would need a bigger tail in order to have enough rudder authority. Which in turn would mean that the airframe would need strengthening to take the added weight and stress from that bigger rudder. Etc. etc. leading to the cost of the engine replacement program spiraling out of control. So in that sense as close to a 1:1 as possible is the right decision.