To begin with, I am not an elite player. I’m just one of many who tried to enjoy this game with my kids and is becoming disillusioned as day goes by. For instance, I’m finding it really difficult to explain to my kids that their hard work - time and resources spent - to build a nice competitive team has gone to waste. 3x this year. My kids feel sad. I am sad. They have decided to drop the game and enjoying PoGo instead.
So, from my point of view - it really doesn’t really matter. Strong dinos today will eventually get the knife; and becomes thrash or near thrash.
So just do what you think is best. It is as good as impossible to have a competitive team for long - unless if you are willing to spend real money on this game (even now it is hard to find ingredients to level up most of your team members). Or you are willing to spend countless hours to do that TapJoy tasks (to earn hard cash and exchange it for coins). For both i.e. spending money or time to do TapJoy, I personally am not willing to - I have much better use for my money and I have a full time job.
Comes the new meta, new set of dinos are needed to remain competitive in the arenas. Need more hard cash and coins again. So in essence, your current team will fast becomes obsolete - at the rate of 6x a year or every 2 months.
I have seen many active players left the game for the same reasons. And I do understand their frustrations. Most of us just can’t cope with the frequency of changes.
So, whatever your decision is, I wish you the best of luck. My advice - do not spend real money on this game. It is nit worth it. Those resources that you spent on will eventually becomes obsolete and unusable.