Quickleaf
Legend
I think you'd have to ban multi-classing. I mean, war domain cleric and rogue? Attack, twf attack, bonus action attack, healing word, disengage/dash? At 3rd level? And how would you treat spiritual weapon? Is that limited by the one bonus action attack rule?
I wonder... if you just take a dual-wielding 3rd level fighter in RAW, how might it compare to this. A 3rd level fighter already can... Attack, TWF Attack (adding Str/Dex mod), Action Surge Attack + TWF Attack (adding Str/Dex mod), Second Wind... comparing this as a "going all out option" between the multiclass (with house rule "on") and the fighter (with house rule "off").
Cleric 2 (War) / Rogue 1 = 1d8+3 Attack + 1d6 TWF + 1d6 Sneak Attack + 1d8+3 War Domain war priest use = 22 avg damage ...Healing Word for 5 hp... Dash or Disengage or Hide
Fighter 3 = 1d8+3 Attack + 1d6+3 TWF + Action Surge (1d8+3 Attack + 1d6+3 TWF) = 28 avg damage ...Second Wind for 8 hp
That seems pretty comparable to me, actually.
I guess what I'm wondering is whether there actually would be that much asymmetrical powering up for multiclassed PCs, or if it's more a universal modest powering up for PCs in general.