A bit off-topic, but I will say this though as it is important.
There are many things in this world which their main function is to trap people by using their weaknesses and profit from them. These are used by many business companies. It is up to you to find out which things are they and whether it is doing you more good, more harm, whether it is worth it or not.
About reaching the highest level in your server, you will be able to do it even with this so called 'new league system', unless they change the system in future where there won't be a so called highest level.Maybe at a certain point you will have to use 'dirty' or cheat ways like tanking.