I installed slipper clutch on 650 Vulcan S to soften the clutch lever, as it has now 3 springs instead of 5. slipper clutch is supposed to soften the hard engine braking; for instance, if you go suddenly from 4tth to 3rd gear without slowing down. but even then it is not a real solution as it is still hard on the engine. so best is to do rev-matching or slow down to the speed where the rpm matches the lower gear. some small bikes like Versys 300 come with slipper clutch, but they are more needed on big displacement bikes.
The most common modification is fitting heavy-duty clutch springs (I wrote about it in another thread), or better frictions plates but I am not sure if that is needed. I found EBC being the only company that produces clutch kits for our bike. .
as you love riding, you need to love you bike