I’d say that’s a very “unhistorical” list (but perfectly fine within the FoW list building systems).

The “engineer/sapper” units with body armour are basically fictional (as the troops refused to wear it in the field as it was too heavy, and you couldn’t run around in the things).

The “decoy” tank company, again a bit fictional from Battlefront. Captured tanks were used during the war (mainly just PZer IIIs and Stug IIIs after the battle of Stalingrad), but mainly either to provide “tracks” for a Russian conversion (such as the SU76i), or perhaps as a specific tactic of sending just a couple of tanks in at the front of a column to cause confusion (but only momentarily), but almost never in formations as large as a tank company.

The “big box” set is fine “if” you wanted to play the Battle of Berlin only (the IS-2s where only around for that in any numbers).

But the main reason it’s a non-historical listing is that you’ve omitted THE most common tanks in the field (T34s), and your “basic” infantry is in a minority vs the special/elite FoW troop types. As I said previously your list is fine working within the confines of the FoW gaming system and/or for tourney play. But for a more historical list I’d go big on the T34s (in 1945 at least 1/3rd were still T34/76s), and on basic infantry. Then I’d look to adding an assault gun (ISU 122) unit as more late war flavour.

Alas as an “historical” force the latest box from Battlefront isn’t the best (but then it’s not the first time they’ve done this in favour of releasing a more FoW/Tourney friendly selection). The SU-76s are fine (used throughout the  mid and late war periods), as are the towed artillery options. But the ISU and IS tank options really limit you to the last days of the war (while the BA64s are more mid war). So the box options in a historical context are a bit off a mess.

You could go for the massed T34 box set instead (and strike fear into your opponent with sheer numbers) if you really want to buy one of the big boxes (same price as the one you picked but with 24 T34s in it 😀 )? It’s a bit silly for numbers (but a handy purchase to split with another gamer or two , as 8 or 12 is a much more reasonable number for on the table top)