Re:What's your thoughts on power and braking with the Jimny?

"Taking off from traffic lights, by the time I'm getting into 2nd gear other cars are generally up my arse or changing lanes to get past me."

That's the low first gear which is useful in a 4x4, but means that most euro box cars are still accelerating in the more road oriented first gear at the point you run out of revs. The gear selection is also a little slow, again in my opinion, which compounds the problem as you try for second gear.
I get around this in my Land Rover by pulling off in second gear, but unfortunately this doesn't work with the 1.3 Jimny, so you don't gain anything. Not saying it won't pull away in second, just that it's no quicker than pulling away in fist.
Not much you can do other than revving it to death in every gear away from the lights, which just about keeps you ahead of the bemused Euro box driver.
This makes for an uncomfortable journey, I find it better to just go with the flow and listen to some great music, they can get past when they can, not my problem.
 

I swap between my Jimny and Boxster almost daily, the Jimny is definitely under powered, but I wouldn’t say my Jimny is under braked, for the weight and speed of the vehicle the brakes cope very well. I am sure that my Boxster would come to a stop in a shorter distance, but it doesn’t feel as though Jimny is much different.

I do note that yours is somewhat heavier than a standard Jimny so acceleration and braking is probably also longer.

As regards acceleration away from the lights, I have given up, ‘make em wait’ is my style of driving and if the want to drive up my arse and pass at a dangerous point they will get greeted with a choice word beginning with a T.

Robin

Thanks for all your replies folks. You've given me plenty of reassurance and a few ideas. Much obliged to you.