If you are talking about me, we can't do anything to change what has already happened so let me know what is wrong about this (Edit: I posted this 4 weeks ago in another thread):
Summer of 2018: Already over the cap with 4 free agents. re-signing Nurk makes luxury tax a foregone conclusion. This is a good thing in our situation. The last two years we've been so concerned about staying out of the luxury tax that it has completely limited our situation. We weren't able to use the MLE last summer or make many moves because they wanted to stay under that line. Staying under that line, short of a miracle trade, isn't an option this year. You mentioned wanting to appease Dame. I believe Allen will do so by going into the tax for him. There are a couple of things that stay the same whether we use the TPE or not and that is that we'd have the tax-MLE to sign a free agent and the 24th pick in the draft. Trades can happen under either scenario. So that leaves using the TPE's as simply adding more money to this year but could be the difference in making this team better or remaining relatively the same.
Summer of 2019: Once again assuming Nurkic is re-signed and no miracle trades to get out of bad contracts are made, we are still over the cap. We have our 2019 1st round pick, a 2nd rounder (via whichever pick is better between Minnesota and LA Lakers), and the tax-MLE. Aminu is the only major free agent. If we don't use the TPE this summer it doesn't give us more options this summer, once again it just puts us further into the tax then we would have (unless we used it on a guy that only has one year left on his deal in which case he'd be off the books then). So where am I missing that next summer would have better options if we didn't use the TPE? We still have our picks and the tax-MLE available in either scenario. The contracts of Turner, Leonard, and Harkless all would have one more year left which may make them more valuable during the season as expiring contracts. If we just put Courtney Lee in as our TPE trade then he would also have one more year left at this point.
Summer of 2020: Lee, Turner, Leonard, and Harkless are now all off the books. If Olshey planned things similar to the summer of 2015 where most/all trades and signings lined up to end this season (for example re-sign Davis in 2018 to a two year deal) we'd still have Dame, CJ, Nurk, Collins, Swanigan, and our 2018 and 2019 draft picks on the team and would be back to having as much flexibility as possible when two players like Dame and CJ make over $60 million. Using the TPE's back in 2018 did nothing to change flexibility at any point in this process.