GMAT CLUB TESTS Review

I have subscribed for GMAT CLUB Tests and have been using them for last 6 months.They are of High standard and quality.They resemble actual GMAT tests.They provide good solution for each and every question we took in the test.The tests provide you good confidence and analysis on areas we need to improve by section wise and more profoundly by topic wise.
But there are some limitations on these tests.
Those are :
1. we are given access to Quizzes also for additional practice,But these Quizzes and Tests share same questions i.e Questions we get in Quizzes and Tests are same.So,if We take more quizzes on particular topic in any section Quant/verbal,our actual number of Tests(allocated in particular section ) will come down.
Ex:For non-Native English speakers ,they work more on verbal Quiz questions and need to take more verbal Tests.But number of verbal tests are very few and these Tests will reduce if they practice more verbal topics in Quizzes.
2.In GMAT CLUB TESTS,Unlike Actual GMAT Test,Difficulty level is not either increasing or Decreasing ,The difficult questions we are getting are of random.

I hope GMAT club works on above limitations and improves further.

Thank you!!!!!!!!