I would have to see how rules work for tOW, but I can understand these concerns because gameplay changed significantly in 8E so people looking at 6E / 7E style combat mechanics in 8E would rightfully be concerned.
Specifically in 8E Armor Piercing and S4 are passed around like candy. Likewise people frequently built towards Deathstars because the whole "Everyone gets to attack back everyone fights in two ranks" leading to shit like "My Orcs are charged by your Ogres, now I counterattack with 40 WS4 S5 attacks". With 8E on the mind "Yeah casualties don't get to attack back you fight in one rank also saves are generally more bound" sound utterly terrifying.
It's just I don't have the tOW rules in front of me. And if it's like 6E and 7E that's a generally reduced concern because part of the whole advantage of Deathstars in those editions was you could justify those enormous point costs because Steadfast and Throwing Entire Goblets Of Dice. In 6E meanwhile a charging unit getting 18 attacks was mean [the sort of thing you generally only saw with Frenzy], and more often you were looking at around 6-13 [depending on if it was 20mm or 25mm, base attacks / equipment, presence of a champion, etcetera]. Likewise if this is a turn back to 6E / 7E in some regards there might be significantly less "Naked S4" models.
I don't want to doom and gloom from a meta perspective as subtle things can change calculus' enormously.