Horrible take
Shotguns are exceedingly limited by ammo capacity, which makes them basically fucking useless in combat.
On the GL, I think the Grenadier is better suited by the M32A1 Multishot Grenade Launcher, (with a short carbine also issued). Then a M230A1 stand alone as an option for Squad/Section leaders for marking.
I do like a micro UAS option of the section/squad level. They are super small they can be controlled on a phone that’s already on the Member and it’s just a tool toolbox aspect. There are also slightly larger 40mm launched systems that can be launched as needed to gain SA. They can be set to follow mode / so clearing a trench system they can indicate limit of exploration on lead elements for fire support direct visually.
Now on the DMR. I am a believer in the DMR at the Platoon level. I’m less and less a believer at the Squad/Section due to High Pressure 5.56mm becoming viable.
Based on your delivery timeframe, I don’t think your new rifle will be high pressure compatible which I think is colossally stupid so com is running high car down here ( high pressure, carbine,) later this year. Having shot a high pressure option from one company I was hitting Larue’s out to 780m very easy with an EoTech and 3x mag from a 11.5” barrel.
There’s definitely still some fleas both on the ammo and the weapon side to work out on my pressure. But realistically what more you want at the squad/ section level? Especially when HighPressure LMG’s are included.