Engineering start before 7a.m. every day, so they're unlikely to start earlier; faults do arise when in use more often than when under maintenance checks (Murphy's law applies here), and after several staff return to Uni. late in the season, training cannot be as thorough.
On site training/guidance should be increased if it exists at all. I thought that was what managers and supervisors were for, but management, who can be identified when carrying "helping hand" grippers? seem to visit rides then disappear quickly.
Satisfaction cannot be guaranteed for all, and those who've had a good day are unlikely to comment, criticism abounds, myself included.