The Martian did very well. He is only a producer on Blade Runner 2049 though, yeah. But Denis Villeneuve has also proven he's a good director and his last few films have all done well.
The Martian did well, but it also had a very successful book backing its awareness. Ridley Scott isn't a hack, but I don't think it's fair to call him bankable. In the last 10 years, his movies have been kinda spotty in terms of both critical and commercial success. I would be particularly wary about giving him a film in the cyberpunk genre, given that successful cyberpunk movies are few and far between.
I have much more faith that Denis Villeneuve will be able to deliver a good movie at a reasonable budget. Scott spent $200 Million dollars to make Robin Hood, and it was still mostly forgettable.