So this is just kind of an obvious suggestion, most MMOs and whatnot have some variance of these two weapontypes. If you wanted to consider incorporating these into Nexus you would also have to make shields more relevant rather than just making them give a large chunk of armor i think it would be crucial to give them a block value perhaps just a static number blocked (either before or after damage reduction from armor, depending how strong you wanted to make the effect) ie if u wanted to do it before u might see higher values like 10-15 being a midrange shield, but if your applying it after 8 might be a high value shield. Or you could have shields just add another flat damage percent on top of armor. I think the block value would be cooler tho.
That said I think it wouldn’t be too hard to keep with the Sharp Thrust Blunt Pole Missile weapon scheme if u wanted but add in one handed or two handed varients. Ie sharp one handed = shortsword, two handed = claymore. You would not be able to use a shield but the tradeoff would be maybe a 25% damage increase perhaps? It could be applied to missile even, using a one handed crossbow compared to a two handed longbow etc. The 25% could be applied to the base damage for two handed and with dual wield it could hit on a seperate attack for 25% (can always tweak those numbers but just throwing a ballpark)
On a side note, Thrust was always a bit of an awkward weapontype imo because polearms could be considered thrust weapons (mainly anyways) and it kind of split swords into two categories. It might almost be better to replace thrust but im just not sure with what. If you changed Sharp and Thrust to sword and dagger it could work but then you would almost need to add axe as well.
Making shields more important for tanks could open up things like shield slam for paladin or something along those lines.