8hr in Hubballi-Bengaluru sector is easy, most of the expresses cover this sector in 8hr even with 7-8 halts. And mostly in few months nearly 25Kms more would be doubled in the congested Arsikere-Tumakuru section. So I feel TK can be added. And Dharwad is the district HQ, many would actually board there, hence its needed. Also Kalyan/Panvel could have been there as many would board there.