They didn't lose many, but no, they weren't as strong in the mid-80's as in 2001/02. Gavaskar & Kapil Dev were world class, of course, and they had their own umpires in those days, but beyond that the side from a couple of years ago was better. That being said, there are parallels. England were missing players in 1984/5 too. Botham declined to tour, and Gooch and several others had got themselves banned. Willis had just retired, so our attack was led by a couple of very inexperienced guys in Foster & Cowans. Of the batsmen, only Gower & Lamb had much of a track record at test level befor the tour. After we lost the first test heavily, several observers thought we were about to suffer another 5-0 reverse.
Ultimately, after the 5-0 at the hands of WI, India was a fresh start several months later against new opposition, and that was true in 2001/02 as well. India were a decent side, but England knew from 12 months previously that they could compete in Asia, so I don't accept the view that 5-0 against Aus would have been significantly more demoralising that 4-1. They still needed guys like Hoggard, Flintoff, Foster & White to stand up & be counted, and that's what they did. That's my take on it anyway. I'm not sure that either of us could prove it 100% one way or the other.