Literally all parks change the wheels out during hot and cold seasons lol.
Multiple parks change the wheels on at least some of their rides for the winter season, but they usually don't change them during
the season. As I was only at Phantasialand, Efteling and Energylandia during winter , I can only speak for those, but I have not seen any difference in the wheels compared to the summer season.
The trimm on the lower airtime hill can be mounted with little effort, a trimm is not a custom designed part. It is basically just a T-shaped piece of metal. The only thing necessary is to bend it a little bit to fit the track, and that is a one dimensional bend, those are really easy to do. With the ride obviously having mounts, it is clear that Intamin wanted to give the options to mount trimms - it is not unusual in such cases that the trimm will even be delivered free of charge, maybe the necessary brake finns are already in storage at Walibi.
Mounting them is also not half as difficult as you are trying to make it. Yes, the first mount is hard to reach, and will likely require a crane or climbers, but the second mount is pretty low to the ground is is reachable via a simple lifting plattform.
Expedition Geforce gets a second set of trimms mounted on it during summer, they don't change the wheel compounds either. Other rides, like Taron for example, have dynamic trimms to avoid trimming to much in the cold weather.
A specific thing to Kondaa is the slow NICR - if the night was cold, the empty train will barely make it anyway, if you go with a different wheel compund, rollbacks are possible, as it will bleed of a lot of speed during the first elements.
The second trimm mount is located after the NICR and can easily avoid this issue, and (unfortunately), they could leave it in place over the course of the season without affecting the high elements.
In the end, we will see, maybe they can make some changes to the final brakerun to get this issue sorted. If they add a trimm, my call is the second mounting option. I highly doubt that they will use a different wheel compound (if they do, the wheels should be the blue ones), but I might be wrong.