I think the demos they added to the original reissue actually have better versions of most of the songs that appear on the LP. Reason being, the production style on the LP just sucks all the life and energy out of the band.
I think the album holds up well if you can listen past the production, which is a necessary skill in metal.
The producer went for a heavy metal sound in a speed metal/death metal era, so it's low on bass and often sounds tinny as a result when played quickly.
However, with an equalizer, you can do an ad hoc "remaster" of your own that works well. Peak the mids, up the bass 50%, and drop the high end about 25%.