While I would agree that the sim did a nice at your EGUL location and it has been doing a fairly good job with lower altitude weather (still 99% cumulus though), upper altitude clouds, even when reported in METAR, are not at all dense:
I was actually pretty excited to see the lower level clouds in the above pic because it looked like it might be a low altitude, solid stratus cloud deck – but it fell apart completely as I approached:
but it was still reminiscent of things I’ve seen in real life and the METAR had switched to multi - high level broken so I was OK with it. They just need to make sure higher level clouds are more solid. Its been two years.