Regardless of an athlete's performance, the coach should have the last say in deciding who will be on his team. He is the chief strategist for any team, and in order to increase its chance of overall success, he must consider the entire team's strengths and weaknesses, not just the abilities or performance of one athlete.
I struggled with this watching the Olympic trials last night. Gabby Douglas was 7th overall but made the team. Apparently the trials is just the final stretch of competition. Going to the Olympics is based not only on how you do at the trials but overall from several championship meets. I respect the judges decision but if Gabby can't be consistent in Rio I will be perturbed. The team did look dominant though so my fingers are crossed.
Kocian might be the defending world champion on uneven bars, but Locklear beat her by .15 points over two nights in St. Louis. Locklear’s long lines and elegant performances scored just a bit higher than Kocian’s more difficult routines. But Locklear eschews the all-around to focus on bars and balance beam, giving the team less room for error if it picks her.
No, higher scores in gymnastics should not beat out coaches choices. Scores are an important indicator of an individual's skills and abilities, but forming a team requires several things that can not always be determined by scores. Coaches may be looking for individuals who can fill certain holes on the team, or can perform well under pressure, etc.