[....]Does anyone know of reliable sources that can provide unbiased overview of limitations and potential problems that a coin and their devteam is facing?
This is probably too time consuming and everyone is busy trying to make money. There may be some people who maintains their own spreadsheet tokens under watch but I doubt they will share it willingly for free. Twitter and Reddit are still your best source of free information. Just be patient in weeding out the shilling bots.