If I were in Shankar's team..

hmm.. not that he invited me, but I would have at least put forward the ideas in the next para. I can't believe that, despite the involvement of so many directors (Shankar, Balaji Shakthivel, KV Anand, JD and Jerry), many scenes sounded amateurish.. With my miniscule brain's limited cinema knowledge and logic, lemme think:

Rajni's profession: To be able to earn Rs. 200 crore (~$50M) in 20 years, I am sure it is not possible by doing any 'job' in US. When Vadivukkarasi asks him in the car, it is certainly meant to tell 'us' what he did, rite? I donno anything about 'Software Systems Architect'; but that doesn't sound big enough to make one save this much.. A far better option would have been to own a software company, or atleast a unique website portal.. U software people, lemme know if I am wrong.. Is this too much to ask from Sujata, who is a tech geek?

Ballelakka song: It suddenly jumps at you, out of nowhere, from inside a pub. Just 1/2 more min. would have been enough to show that Rajni is visiting his native village or 'kuladheivam' and then the song starts. And I am not even mentioning about a couple more days of practice to improve his dance steps.

Shriya wooing technique: Anything else would have better than the whole technique. Who would lock an adult daughter in a house, along with two suspicious strangers? They could have just locked themselves from inside? I know it is a small thing, but makes sense, no?

Bringing the black money out: Did Rajni and Vivek have that kinda power to assemble the auditors, drivers and servants of all the industrial bigwigs under one roof? Foolish to assume that the auditors would succumb to revealing their clients' information if beaten up by some goondas. How about this? Rajni being tech-savvy, writes a super program which enters the PC's of all the industrialists and their auditors, copies all the data and sends him.. By the time Rajni writes such a program, Vivek collects all their address, and by bugging the BSNL's main server, they are able to send the virus to the PC's in those addresses.. An inspiration from the climax of Independence day, but hey, why not introduce this kinda techniques to Tamil audience?

Transfer of hunderds of millions of rupees and dollars: One Muslim 'Bhai' staying in one 'kurukku sandhu' would be able to do such a monumental transaction? As a corollary to my previous point, the money transaction could be completely on-line, from the industrialists' a/c to Rajni's Swiss bank a/c, to his US a/c, and finally to his friends.

Shriya saving Rajni: True, trains will stop if anything 'red' is waved at them.. but Shreya manages to run towards the train, between the rails, holding the thaavani, but still the train manages to stop a few feet in front of her. At that speed, wouldn't the driver have managed to see a man standing mid-track and stop it, anyway? It would have made sense, if Rajni is standing at such a place that the driver can't see him (say, after a turn) and then Shriya is waving red at the train at the linear path, before the curve and makes it stop.

Climax fight: Even if you assume that Suman is storing all his money in that 'auspicious' place, wouldn't it all be in bundles, and stapled? How can they all fly as individual currency, oh, bcos Rajni is fighting? And when the whole floor is filled with 1000's and 500's, why are all the students (esp. the 'capitation fee collecting' kid) catch them mid-air? The whole thing could have been compressed to just the fight by the Mottai boss, which would have been more than enough, without the currency flying effect.

Shankar is known to take care of such minute details usually (e.g., Nasser asks Vikram in 'Anniyan' about where Remo manages to get money to spend a lot for wooing Sada, and Vikram gives a reasonable answer). I think that's what made him stand apart from other directors. God only knows what happened in 'Sivaji'.