I don't see how just making the cover removable would help much with repairability. You would need to design almost everything to be modular in order to actually make it somewhat repairable, and since heat is usually the big issue, making things modular could result in worse fittings and t...
This does not happen often and when it does the filament usually broke after it warmed up, as opposed to during a cold start. A bulb with a "stable burnout arc" often, maybe usually produces a soft buzzing sound if operating on AC. This is not a fault of the socket nor the fixture...
Make sure your little figurine can fit through the neck (mine barely fit, it nearly broke off the angel wing trying to get it in). Cut a piece of cork to glue onto the bottom of the angel. This is so that it can stand high enough in the light bulb that all of it can be seen...