IMHO the recent problem of SCP is the conversion to 32-bit graphics, older cards don't have enough on-board memory.
In other words some of us finally had to realise that our vidcards are not up for the job (there's a reson most games don't use textures with that good quality), though I'm all for the change.
Though to verfy this we would need extensive testing.
The HT&L conversion supposed to ease things - which it does, but the new texture strain makes it hard to know where the hardware problem ends and the coding trouble starts.
That's the reason why I will wait 'til the "official stabile build" before playing around with the field of view.