Your class can make a huge difference in how difficult, along with how you have spec'd Liara.
I have only played this fight once in MELE as I am waiting on a patch to hopefully drop and fix some of the bugs and power issues with Adepts. I played Infiltrator and it was pretty easy in MELE, but if you want a good view of the OE version of Vanguard then here is a video of the fight. Vanguard battle of SB in OE ME2.
Playing Mass Effect Andromeda actually helped me in this fight as it encouraged a more fluid thought on cover, instead of the more static system of ME2. Cover is what blocks shots, not something you should stick to like glue. Also having powers that stagger the SB is essential, such as warp and in OE version Singularity(haven't really had much practice in MELE so don't know how bad they nerfed it here).