Some upgrades that I think would benefit the dialogue wheel system.
1) Disappearing Investigate options. Meaning, when you choose one option and get the answer it disappears from the menu. (done in Inquisition)
2) Class/background-specific options (done in Inquisition)
3) Some icons, namely - General, Yes, No, Special (for point two), Investigate, faction-specific (similar to Underworld, Politics, History and Arcane). Taken from Dragon Age inquisition manual (Link). No icons for romance and conversation tone.
4) Neutral response option, similar to ME1 and ME2
5) As little autodialogue as possible, even at the expense of fewer dialogue lines for protagonist.
6) No more "pick top right (or blue) to win". Mix options and their outcomes.
7) If character wants to investigate something, don't make him say "I thought the asari needed other species to reproduce". Say instead "How did the asari come to cross-species reproduction?"
8) Class-specific interrupts (with a unique icon, not the same mouse button prompt as Renegade/Paragon, at least give it a different color).
9) Squadmate approval. The protagonist should not be idolized regarless of his/her choices. Governs availability of certain dialogue options.
10) Dialogue wheel appearance similar to ME1. This one is a bit lengthy to explain. In ME1 when you were presented with a dialogue wheel it appeared only at the very final moment of the conversation and it resulted in the character getting stuck for some time. ME3 "fixed" it by making the wheel to appear earlier. However, ME1 had a workaround - you could click your mouse to make the wheel appear while you or NPC is still talking. ME3 doesn't have such a thing and early dialogue wheel messes with screenshots. I want it to appear late with an option to make it appear earlier by clicking the mouse.