Another route possibility, not necessarily a better one but a perfectly reasonable one, is I-71 to I-90 to I-86 to I-88 and then however you want to go from the Albany area. This does give you the possibility of going across some very pretty areas in Vermont and New Hampshire. The White Mountains are lovely. Parts of I-86 and I-88 used to be pretty rough, but for the most part they've fixed them up in the past several years and it's not bad going IMHO.
Depending on your schedule and interests, Knoebels amusement park is a fun place for a day or two. Their campground on site is clean and functional and decently kept, but not anything special otherwise; but the location and convenience more than makes up for any shortcomings, in my opinion.
There are some marvelous state parks in the Finger Lakes region of New York, such as Letchworth and Watkins Glen. (Letchworth I guess is a bit far west to be in the Finger Lakes region, maybe.)
Boston is a neat city to see but absolutely not to drive an RV through or in. Propane is not permitted in the Boston area tunnels, so avoid I-93 and I-90 west of I-95. Driving under in a car is not too bad, but navigating and finding parking along the surface streets is still rather a mess. The fine art museum, science museum, USS Independence ("Old Ironsides"), among various other sites are all well worth seeing.