There's an FOV fix for Mass Effect Legendary Edition already

Though it's up to a rating of Very Positive now, Mass Effect Legendary Edition launched to mixed user reviews on Steam. Among the complaints were the absence of a field-of-view slider, leaving it with a tight FOV of 70. Modders have already come to the rescue, however, with JadeBarker uploading Better Camera (Higher FOV) to NexusMods on the day its Mass Effect Legendary Edition section opened.

Anyone who modded the original games will be familiar with Coalesced.bin, the file in your BioGame\CookedPCConsole...