The 12 Scottish Premier League teams are due to hold a vote on plans for 12-12-18 structure on Monday, while the lower league sides from the Scottish Football League will have their say on the following Friday. But there is already uncertainty on whether the proposals - which also lay out hopes for a combined league body and a fairer share of cash among Scotland's clubs - will get enough backing.
Fenlon told Press Association Sport: "It's dragged on a bit long to be honest. The vote should have been a good while ago to give people time to digest it."
St Mirren say they will vote no in the SPL ballot and, with an 11-1 majority needed, Ross County's doubts could yet cause the scheme to collapse.
In the SFL, meanwhile, a recent informal vote saw the clubs split down the middle on whether or not to proceed with a new set-up next term.
As for Fenlon, he believes league bosses and club chairman have had long enough to sort out the mess.
"I don't know the full process of what went on but if you are making changes I think the decisions should be taken a little bit earlier so they can can make adjustments. Now we are at the tail end of the season, it's not leaving us with a lot of time to prepare," Fenlon added.
Fenlon's focus in the short-term, however, is not on league business but on taking care of Irn-Bru First Division side Falkirk in Saturday's William Hill Scottish Cup semi-final clash.
The game comes just 11 months after the Edinburgh side's last trip to Hampden Park, when they were humiliated with in a 5-1 cup final defeat to city rivals Hearts. But the Irishman insists he has not said a word about that derby disaster to his players and will instead tell them to think back to their last-four win over Aberdeen last term if they need inspiration from the past.
"I said after the final last year that there was nothing I could do about the defeat at that point. It was done and dusted," he said. "My mind is now focused on leading this club to another cup final. That's all I'm thinking about. We just need to go to Hampden and give it our best."