One thing that feels bad to me is that Framer kits and Gear cost 1,500 Trophy Crystals and weapons cost 3,000 Trophy crystals, but the reward for most levels is 1,000 Trophy Crystals. To get 2/3 a piece of gear for a level up feels bad. The only levels I feel any excitement about achieving are every fifth level.
PVP SERIES 5 is
Five items
28,000 Trophy Crystals
My suggestion for PVP SERIES 6
Instead of every 5 levels, rewards are every 3 levels. There are many old PvP rewards that should be recycled into the Series system to draw more new players in and get veteran players excited again. Return these old items to achieve this increase in item rewards.
Trophy Crystals in better quantities. (28,500 Trophy Crystals total)
It's vital to the health of PvP that there be this amount of decent, obtainable rewards to draw new players into PvP.
Maybe it's too late for changes to the next PvP series, but hopefully this feedback can help for future series. What do my peers here think of my suggestion?

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I have some other thoughts... like losing games as quickly as possible on purpose shouldn't be a viable way to level PvP series, but maybe that's for another post.