Interesting bike marcalia, you really need to ride one to see if the foot forward riding position is a good fit for yourself. I’ve been threatening to do the same for years (a lighter bike with a lower seat) but the forward pegs ring alarm bells to me. It may be I’d get used to it but stop start riding with pegs in that position seems counter intuitive to me but again try for yourself.
Another consideration is heat from the exhaust pipes, how will it feel sitting in traffic on a hot summers day? The final one is vibration from that twin engine. Lots of character I’m sure but how long before your hands get numb?
Please don’t think I’m overly criticising the VN900, it may be the perfect bike for you. Kawasaki have been making this style for years they know their market. I suspect the latest Japanese in-line twins are somewhat sanitised in comparison to get through modern emissions (like the current Vulcan models).
The above are my concerns if I were to move from my GSX1250fa (sports tourer inline four with lots of grunt). Just a thought but have a shot on a Suzuki SV650, the seat is likely higher than the VN but it’s really light and the engine was a blast.