The 'One Nation, One Poll' in essence can reduce costs and could be a beneficial exercise. I still have some concerns over:
1. Horse Trading after the elections (stuff that's happening in Maharashtra)
2. In the event of the dissolution of a state assembly- how will this work? Let's say the Assembly of Odisha is dissolved after 2 years. would new elections be held again? Does the new govt get to stay in power for the next 3 years or will they be given a mandate for 5 years?
I largely agree with
@SaiSrini 's pointers. That said though, ONOP might help consolidate power in a good manner( I believe thats what the BJP is getting at, however, wont be so sure if the Congress gets it)
Lastly, I feel in India, the ONOP wouldn't work unless and until we make some constitutional changes. The ONOP will work in USA as their format is based on the President and the Senate which are separate entities. For it to work in India, we need to get rid of the titles of PM, CM. Let the states be governed by the Governor(elected via direct election) and the country ought to be run by the President.