Cutoffs aren’t decreasing constantly for Bitsat.If you observed carefully cutoffs for most preferred branches like CSE and EEE/ECE are actually increasing or remaining same(as it’s already too high) over past 4–5 years.
There was a sharp descrease in dual degree cutoffs in 2017,this was mainly because people weren’t aware about the increment in seats that year and hence many students (who scored around 230–280) didn’t apply for counselling as they thought their score is too low compared to last year’s(2016) cutoff which was 296.
Seeing so low cutoff for 2017(202) almost everyone who scored in range of 190–280 applied for counselling in 2018,as a result cutoff jumped again to 250+ in 2018(a 50 mark increase). Cutoffs remained same/increased by 2–5 marks for some branches in 2019.
So it’s incorrect to say that cutoffs are decreasing for Bitsat.
As for glory,if you check Bits Pilani Placements stats,you will find that it’s still improving every year and Placements at Bits are no less than old IITs.