The pros for this is it is a logical next step for a maturing market. Until now, everyone could trade, now higher end traders have futures and a single index to lure their large volumes of cash into this market. It has a minimum of $10K per investment and needs to be used by only accredited investors who have over $1M in assets or $200K in income every year. It is a smart tool to recruit large sums and keep them in rotation as index folks are "set it and forget it" type folks normally. Moves are done usually once a quarter.
The cons for this is it's not really something most mere mortals will use. Also, it is using only the 4 large coins that Coinbase supports, which already generally trend together. Its super top heavy on BTC (a whopping 62 percent, followed by 27 percent ether, 7 percent bitcoin cash, and 4 percent litecoin), which given the price for BTC will make it hard to appreciate. That obviously can change though.
IMHO, it's something to watch. If it gets used a lot, that shows this market is maturing much faster, and that is a good thing for us mere mortals who've been here a while.