Here are some quick answers to things we have not already covered above
Aside from the obvious nostalgia factor, there's actually some competitive cards here that have not been reprinted in years, some of them not at all
Companions did not take up a slot of the 99, thus it would have been an auto-include in any deck that would have been able to run it, though this was spotted by Wizards before the release of Ikoria and hence received a day 0 ban
This reprinting of Cuombajj Witches from the Arabian Nights set over 20 years ago deserves some new art and McKinnon delights once again with nice symmetry and obvious contrast between black and white
This is largely due to Krenko, Mob Boss being an incredibly self-sufficient card
While both the artwork and the cards strength have not stood the test of time, Mewtwo ex remains a relatively rare and nostalgic card, commanding a decent price on TCGplayer