So yeah, absorbing the Four Blessings should be entirely possible, as it fits several narratives and plot points that have been emphasised in the series. Also, it would actually give a chance for the Alliance to fight against the Demon Clan since they have 5C-Meliodas and potentially 4C-Mael. Just think, Meliodas is absorbing 5 commandments (25% of DK), Mael has 4 commandments (20%), and 2 Blessings (Tornado + Ocean = 25%) just became free. Would be a prime time for someone on the alliance side to absorb these two and be able to equivalently fight Meliodas and defeat Mael. Example: Ludoshel, Elizabeth, and Mael (if he becomes good).