The Kenevo is not a trail bike. If your intended purpose is pure gap jumps and hits then you've got yourself the right weapon in a Kenevo. That's all Bike Park or Freeride stuff. Its intended purpose. If you're saying there's a jump line you love lapping that your Decoy lacks, a Kenevo then yes of course, is your correct weapon of choice for what you like to do.
However, a Decoy can do almost everything well. The Kenevo does certain things very well. But lacks in other areas. General single track which is 99% of what most of us ride then the Decoy, IMHO is way more fun. The Kenevo is a tank. That's just me of course. It's all about the intended purpose, and personal preference.
It's so hard on here to say what's right for anyone based on what's said without riding with them.
A bike is the same choice as a car, what are you going to do with it? What's your skill level? Where are you taking it regularly? What do you like? What do you want to do with it? etc etc
You've given us one example of where the Decoy/Shimano didn't meet your expectations. It climbs fine. You have to be in the right gear, that's basic MTB stuff. That's where many say it's more natural, and love it.
The Brose hides a lot of 'skill' errors as does a Kenevo. That's not a stab at you. I had a very wanky car before, and it hid I was a bad driver. Just great design. But then the guys at the track driving Ariel Atom's said I was the wanker with all the driver-assist and design extras. I Couldn't win. It helped me mucho.
For me, when I rode it the Decoy, it met all my expectations from the perspective of it can do anything, it's just a different skillset. Every bike/motor/battery has different iterations of what's expected of you as the rider. Take the Levo SL. It's really not for everyone.
All the questions I ask, can't be answered without knowing you personally. It's up to you, and it's your money. What you love as the rider.
@Gary Is a very decent rider who could probably ride anything, anywhere. We aren't all like that. He's applying his skill, to your problem. I would not take offense. 3 years down the track you may see what he may or may not be saying..As always it's your choice. This is an internet forum with every level of skill and tact all smashed into one wonderful arena..
If you're mostly riding Gaps, Drops, Hips, Bike Parks etc then Yeh get the Kenevo. If it's 95% Singletrack and your swapping out the Decoy as it's not perfoming for the 5% as the Kenevo would your gonna find the Kenevo just doesn't give you the fun you get from other the 95% on the Decoy. It's super fun to start with riding a carpet that soaks everything up, but then your just a passenger, rather than the pilot of the bike....Just my 5c....
Enjoy your Kenevo. There's a bike out there for all of us!