I likes the shine. It is a bit bright, but we're used to darker maps.
But yeah, that shine is a clear sign that the lighting needs some evening out. Other than that, map looks awesome. I'll have to go screw around on it if I ever get the time.
it does definitely look like too much light... i'm a bit of a map editor... i'm not really great at it... but did the creator remember to make enough cubemaps... in HDR and LDR??? that could help
Cubemaps and HDR
If the map has been compiled with the HDR lighting option enabled in VRAD, cubemaps must be built in both HDR and LDR (non-HDR) modes. Building cubemaps in only one mode will mean that cubemaps will not be present the other mode. For information on how to build cubemaps under HDR, see HDR Lighting Basics.