When comparing Deadly Reentry vs Mechjeb, the Slant community recommends Mechjeb for most people. In the question“What are the best Kerbal Space Program mods?” Mechjeb is ranked 8th while Deadly Reentry is ranked 34th. The most important reason people chose Mechjeb is:
Real rockets use autopilot, so this is more realistic and not cheating.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Add reentry heating
As the craft comes in from outer space and into and through gases in the atmosphere it will get damaged by the heat. Mod includes heat shield for reentry.
Pro Adds g-force overloads
Crew can die from inability to cope with weight produced by acceleration.
Pro Realistic
Real rockets use autopilot, so this is more realistic and not cheating.
Pro Automates some tasks, while still keeping you in charge
Even if you scoff at the idea of having the computer do maneuvers for you, there are still numerous other useful tools for manual flight.