I'd have started Moeen Ali over Rachin in the first game. But seeing how the latter has picked up and performed, I feel there's no space for Moeen now. Mitchell is very crucial because he's been one of the best all-format players of the last few years (Definitely a better batter than Moeen). So Moeen can only come in through a bowling role (where again, Santa and Theekshana will trump him)
I would have surely gone Nabi over Mulani and Madhwal for Maphaka. But it was good that they backed the 17 yo guy cause dropping after one game would be an ugly dent of confidence for someone that young. But I feel Nabi has got to play somewhere. MI shouldn't really be needing to play 3 overseas pacers at any time with Bumrah and Madhwal already in. So it's either Brevis or Nabi- and the former doesn't fit in the template once SKY is back. And don't forget- MI's spin attack is over-reliant on Chawla. Mohammad Nabi solves a lot of issues here.
The impact rule strategy was very nice. RR did a good one too first game. Batting first, still played Ash at 7. Would bring in Rovman if the batting collapsed or didn't kick on. But if it did (which it did) then no need of Powell in the middle. Bring Burger in the bowling attack and have 6 options.
Makes me realise Impact sub isn't just playing a defined set of 12 players- a random batsman being subbed out while bowling and the worst batsman being subbed out while batting- which is what I always made of it. But teams can just pick a XI of players with enough batting and bowling options and have both a batting and bowling impact sub option, which they can use based on situation- batter if the team collapses and needs runs, bowlers if you wanna have options in the attack. CSK with their deep batting and bowling depth can afford to easily use this tactic.
I doubt Mo would have been preferred over Rachin at any point due to the different roles they play. CSK are quite stubborn over their roles and combinations to the point of sticking to them at all costs until they're forced to adapt but once they do make an adaptation they rarely go back to what they previously preferred. It makes them look like a tactical dinosaurs but I believe they're quite flexible and creative, they're just not as open with their plans as some of the other teams. My theory is that Rachin was bought primarily because Fleming realised (or was told discreetly) that Conway wasn't in good touch and they might need an alternative for the opening role. It would allow them to have a backup to Conway (I doubt they would have wanted to actually replace him though, he would have likely played almost all of the games and played a few as the keeper to give Dhoni some rest) and have a look at a very promising player who was likely to be undervalued due to his base T20 stats and decide if he's worth a cheap retention next year... but fate took a different turn and now CSK may have to pay a premium to retain Rachin. I would still do it because he's really, really good. Mo's unlikely to be picked for his bowling either even if he's been quite valuable with it, gotta agree with that. I think his role at the moment is to be the alternate spin basher or an extra one depending on how the rest of the campaign goes by.
I don't rate Nabi too highly but at this point I can see why he would be valuable if only to provide an extra spin option. Was surprised it took them so long to bring Madhwal in despite him playing well last season; on the same note what happened to Wadhera? Is he injured or did he have a poor SMAT?
I do like the more creative solutions teams are looking for with the impact sub this season compared to last even if the majority have preferred to do it the dull way. I can't fault them for doing it, the impact sub gives you an all-rounder that can average in the high twenties with the bat and in the mid twenties with the ball as the worst case while being an upgrade on the fielding side on paper. If such a player were to exist in the auction they would be the most expensive player. I do think a few teams are realising that such an option may not always be the best one even if it's fairly simple to use and the flexibility that can be extracted from it with the examples we've provided can be better on a game by game basis even if the stats don't outline that. I would like to see what sort of a squad teams can build with this rule in mind in the upcoming mega-auction since they would have all realised the benefits of it.