I've had a 1.5 litre 130 hp Jazz Dynamic (sold as Sport in UK) for a year now. I like the performance, it's very lively from 3000 rpm to redline, but at the same time humble to cruise high gear at low speed. 8.7 seconds from 0 to 100 km/h is nice. I would call it at least warm hatch.
My biggest complaints besides the annoying nanny-state systems are sun reflection from dash to windscreen and uncomfortable seats and especially headrests forcing head too front. I know it's not safe, but I have my headrest turned around to allow more comfortable head position. But these are all valid to 1.3 litre models as well.
Regarding carbon buildup, people in US, where that same 1.5 litre 130 hp engine is the only option, there are credible opinions that the best and maybe the only way to avoid buildup is to use the performance regularly, i.e. accelerate often with full throttle and high rpm. Not any problem for me.
My typical fuel consumption per tankful is 5.5-6,2 l/100 km (43-38 mpg) depending on weather and usage. I do not try to drive economically.