I guarantee if you go through all the requirements to max out your Grimoire, by the end of it you will progress and become a better player. Going from lets say a 2500 Grimoire to 3500 is a big transition. I look at people with high Grimoire scores as Navy Seal's. You know you can drop them in any situation and they will perform. There might be some people more skilled in certain areas, but they're a jack of all trades. I would take someone with a 3500 Grimoire over a 2500 any day for my fireteam. That score insures confidence to me that they will know what they're doing.