Something tells me you are again spreading false information.
Part1:
http://www.coh2-stats.com/squads/guards_troops_assault_mp: that says it's 32.3 till 6 range.
Although, i think the site accounts as 6 SVT squad.
3 SVT + 3 PPSH: 39.717/8.052/2.325
Note: they don't use Shock profile, so they only do damage at sword range (6).
You want to compare it to another unit?
Assault Grens: 42.45/14.79/1.36
You know how most people say that Assault Grens are lackluster and don't scale to late game. Well, Ass Grens are a 0 CP unit, imagine them arriving at 5 CP.
Conscripts PPSH is not meta > Assault Guards won't never be meta.
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Part2: Assault Guards having better veterancy than PTRS Guards.
Assault Guards: -29% RA, +40% Acc, -25% Cooldown, +25% Nade range
Guards: +10% Pen, +30% Acc, -20% Cooldown, -17%/-29% RA, +30% Button
Defensive vs Offensive edges. Not neccesarily better.
TL;DR: they don't have awesome close range DPS. Vanilla Paratroopers laugh at them at ALL distances for example. They have worst midrange damage than Assault Grenadiers, and they don't have means to get into close range in comparison to assaulting units (sprint, hoorah, smoke or armor).
Assault Guards use the 3 of the Shock Troop PPsHs, and 3 of the Penal SvT's. The only unique PPsH's in the game are the Conscript one and the Partisan one.
Were are you getting their info that they use the conscript/not shock PPsH? Not to mention the fact that the earlier received accuracy you get sooner allows you to keep them around longer meaning a higher chance of getting somewhere veterancy wise.
Again this is working around the point of the fact that they are A. cheaper than Guards, B. Come with a reinforcement field HT that you can also use to cart them around doing close range DPS to things or throw a flame engineer (or penal) or two in.
The Dshk allows you get suppression with out t2, the Guards + HT lets you get a HT without T3, and the M4C is arguably one of the best mediums in the game with it's insanely good DPS. The reason this commander is seen as lackluster is because of the power of Guards Motor and Shock Rifle comparatively, but Iv seen many very good players use this to kick ass.