User blog comment:Suparockr/List of Plotholes throughout the series/@comment-3325589-20120717070525

I can't offhand think of any plot holes or dangling plot lines that haven't already been mentioned, but there are some weird retcons in ME3. For instance:

-According to the codices in ME1 and 2, capital ship class Reapers have a dreadnought-style axial mass accelerator (though we never see it). This disappears in ME3, and the figures for explosive yield on that weapon apply to their MHD cannon instead. On a related note, codex entries mention that greater weapon range is one of the main advantages Reapers have in ship-to-ship combat, but in movies we repeatedly see Reapers closing distance in order to use their main cannons on cruisers that are already firing at them. -The backstories for the three main merc companies (Blue Suns, Eclipse, and Blood Pack) change dramatically between 2 and 3. There's no mention of Vido Santiago and Zaeed Massani in the story of the Blue Suns, or clan Weyrloc in the Blood Pack, and the latter seems to be an exclusively vorcha company in ME3, whereas it was krogan-led in ME2, with the vorcha treated as disposable shock troops.