Pros:
+back 9 is still playable
+back 9 is short and woodsy, might appeal to newer players who like sub-200 foot holes
Cons:
-former front 9 is now only 4 baskets in a relatively open area, with no tee signs
-back 9 can get muddy, and is loaded with mosquitoes in warm months
-natural tees that can get slippery
Other Thoughts:
Even in its best days of years gone by, Lefleur's Bluff was always a strange course, mainly due to the huge distance between the front and back 9. It's at least a 3/4 to one mile drive between what is now the "front 4" and the back 9.
The front 4 once had 9 baskets and was once a halfway-decent open and windy course, but now it is little more than a 4-basket practice area, with no remaining tee signs. There's a huge playground on what used to be part of the course. There is no longer a fee to play/practice on the front 4 baskets.
The back 9 is in the Mayes Lake section of the state park and there's a $2 fee to enter. This should probably be listed as a 9-hole course here on this website rather than part of an 18-holer, with the front 4 listed as a practice area.
The back 9 is forested and short with most holes under 200 feet, a great place for ace runs. It can get muddy and in the summer bug spray is recommended for numerous mosquitoes. Not a bad place to work on the short game for more advanced players, as the holes have a decent mix of left & right fairly tight lines.
By itself the back 9 would probably rate 1 or 1.5, but I'm giving LeFleur's a 0.5 due to the confusion most players will experience trying to figure out where the front 9 is combined with the back 9 being almost a mile away.