This is too common now, good percentage of projects are now adding an addendum to their whitepaper by introducing DeFi due to the success experienced this year. Some even derail from their initial concept and went fully into DeFi solution. Copycat will not last long but only those who have the original concept.
Agree with you, those who are insisting to incorporate defi will surely will be compromised. What if defi hype gone, maybe they will remove their feature of defi again and add whats gonna be the trend on coming years.
If you noticed the copy cats they are the one that keep pushing on thr idea of defi by showing enormous changes on their website, whitepaper and even creating additional feature to a complete set up platform.