So I saw a thread the other day commenting on re-doing Bugs Land and several people said they'd rip out the ladybugs and the bumper cars since they're redundant due to Maters and Luigi's Flying tires. While the bumper cars are easier to steer than the flying tires, Luigi's does have better theming, higher speeds, higher capacity, and a shorter height requirement.
My replacement for the bumper cars would be a frog-hopper type attraction similar to Woodstock's Air Mail at Knott's Berry Farm. Gypsy the butterfly and her sisters would fly you high up under the big top once Manny the praying mantis starts the cycle with his line,"Transformation, transformation, transformation!" (To help with this recreation the base of the ride could be a Chinese take-out box.) To alleviate capacity concerns, the ride tower would be 6-8 butterfly themed rows arranged in a hexagon/octagon. I just watched a video of Woodstock's Air Mail and thing I like is the fact that there's only one lap bar restraint for a row of 6-7 guests. The other thing I looked up is frog-hopper type attractions can have a height requirement as low as 36", which is the same as the bumper cars right now and 4" shorter than Jumpin' Jellyfish's/Tower of Terror/Radiator Springs Racers /Soarin' Over California 40" height requirement. The butterfly theming would also help with DCA's lack of "girl rides".
The ladybugs should stay but I'd make them a clone of the Teacups that you can spin and add more ladybugs to increase capacity. If they really wanted to splurge I'd extend the ride floor out to the replace the hose water spigot and make a themed bridge that passes directly over the ladybugs ride floor to connect Hollywood Land and Cars Land.