it's working as intended though
Not too sure... Apothecary reads "Whenever you summon..." when Evolve says "Transform your minions..." If you use two different words for it, you should let them be 2 different things, like "Play a minion" and "Summon a minion" are two different things (even if Play also means summon). I guess it's fine to consider both of them are correct, it's Blizzard dev team's job to officially say Transform =/= Summon.
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What a 500 MB?
PC launcher showed me, like it start downloading 600+MB, but then progress bar was filled quickly. Looks like about 10-15 MB was downloaded, and client just calculate checksum to verify data files. I would not be able to load 500 megabytes very quickly through a mobile Internet.
Same story with previous patches. Launcher show that it is going to download 3+ GB, but it's not true.