I cannot understand the issue here, you bought a TE511, expecting to use it one the road more than off the road, one look at the tyres will make you think, ok not really road tyres, but there are tyres you can replace that are more road orientated but ok off road, in the same size as what is on there atm, it is only the tyres and gearing that makes it not as good on the road as it could be. The seat for longer distance, and an added fuel tank.
I think it is a duel sport bike, just how you determine the word sports it is not a sports bike, like an R1, but it can do many sports if you set it up right, people track day them, off road them in the worse conditions, use on sand, mud, in fact anything is possible, and then on road. if you owned a Jeep say if you wanted to really use that off road like you would the TE, you would fit different tyres, possible uprate suspension, why would you expect to use the TE511 any different for so many different uses. get out there and use it even on the original tyres I did not find it so bad after a 100 miles, though you would not want to do loads of road miles on those tyres as you will square them off quickly.
My View still stands this is a great all round bike, They are a bargain, and I think in time will hold their price as it is an end of an era, and be sort after, that will do everything, & anything with some minor set up changes to suit. In some ways I wished I had got a TE511 over a TE449.