-It specifies them as a case. A plasma torpedoes isn't anything physical until it is fired. In MD, they blow them up before firing.
-Source. Plasma pistols have given marines extreme damage, and one needier round was often a death sentence (Not technically plasma, but meh) and so forth. In addition, plasma rounds can melt the titanium of the MJOLNIR armour.
-Where is it stated they can hover? It is repeatedly stated that they do not have antigravity (Gravity on ships is generated through rotating rings, rather than the covenant) and no UNSC ships (Exception; vindication, strident, infinity and autumn class have covenant and forerunner tech in them and are postwar adoptions) have vertical thrusters from what is seen.
Also, the fact that the Sangheili are portrayed as helpless and humans a ******* superpower, despite the fact that most of their fleet was obliterated at Earth and Reach, with the Sangheili commandeering most of the fleets and battle. The fact that they are shown as almost a tier 6 species is ******* stupid and promotes the idioticness that humans are now the most powerful force despite the fact that pretty much every species could roflstomp them in combat. Hell, Vata Gajat nearly destroyed the infinity with a small station and a corvette- a fleet with several RCS class cruisers and CAS class would completely destroy the human fleets.
Also, Halo Landfall. While not stating the speed, it clearly shows banshees using their maximum speed. While nothing is saying they can't slow down, you seem to be making a point they can't go at a higher speed. Once again, it is stated that games =/= lore, as a fuel rod would be creating a huge crater, and a wraith would destroy half a ******* map.
But that would make the page take ages to load. I might put them in spoilers.