Photo by Matthew Maxey/Icon Sportswire via Getty ImagesBig changes are coming to the PGA Tour very soon, with CEO Brian Rolapp certainly not afraid to mix things up.Now Tony Finau and Justin Thomas have just proven exactly why one of Rolapp’s proposed changes is so badly needed.The PGA Tour has gone from strength to strength over the past few years in all fairness.However, PGA Tour CEO Brian Rolapp clearly believes that there is huge room for improvement, and one of the biggest issues that needs to be addressed has been highlighted this week.Justin Thomas and Tony Finau have both really struggled at the RBC Heritage this week at Harbour Town Golf Links.Photo by Tracy Wilcox/PGA TOUR via Getty ImagesThomas, 32, was dead-last after 36 holes at nine over while Finau was one shot and one place ahead of him.If Rolapp had any doubts about one of his proposed changes for the 2027 season, he won’t anymore after watching proceedings on Hilton Head Island.Justin Thomas and Tony Finau prove why PGA Tour rule change is incomingThe majority of Signature Events on the PGA Tour do not have halfway cuts.That is such a shame and, if anything, it highlights real hypocrisy from the PGA Tour.By having zero jeopardy in many of their Signature Events, the PGA Tour is actually copying LIV Golf’s model, and everything they profess to hate.Back in March, Rolapp outlined his six-point plan for a new and improved PGA Tour in 2027.One of the big changes incoming for the 2027 season is 120-man fields for Signature Events with cuts returning at the halfway point.Photo by Andrew Redington/Getty ImagesThis week’s event has proven exactly why the PGA Tour is crying out for those kinds of tournaments again.Thomas and Finau would have been grateful for a couple of extra days rest this week, having played so poorly during the first two rounds at Harbour Town.However, with no cut in play, they were the first group out on Saturday at 6:55 am.PGA Tour players will surely be keen for halfway cuts as wellThe thing is, Thomas and Finau probably don’t even want to play the final 36 holes at Harbour Town.Heading home and working on their games at their own practice facilities would surely be more beneficial for them.Of course, Finau or Thomas are capable of shooting in the low-60s but it’s highly unlikely that will happen, considering the fact that they finished at eight and nine over par respectively for the first two rounds.Larger fields with halfway cuts are desperately needed in every single event on the PGA Tour moving forward.And the likes of Tony Finau and Justin Thomas struggling at the RBC Heritage, yet being obligated to hang around for another two days, proves exactly why that is the case.