They are taking new leases because the previous leases expired due to not producing in commercial quantities. The wells had been shut in due to casing leaks.
Price of oil was much higher in 2016, so lease offers were higher. If you can get a 3/16ths lease that would be better, even if the bonus is smaller. They may want to repair the casing leaks or they may want to drill something new. As Richard said, the clauses in the lease are much more important and will probably need some tweaking from the draft they send you.