Honestly, been playing 6 days using VPN and I find it one of the most generous FtP gatchas in Nutaku. They are basically giving you several shards of 5* heros per day, so its just a matter of time.
Besides the arent ranking rewards in arena per position, only rank based ones so keep playing and you get same prizes (or almost) as whales
In fact seems a bit too much FtP lol...I dont feel the urge to spend in pulls at all as they seem really expensive for what they give...150$ for a garanteed 5* cmon..

Pretty good game and a real upgrade to Mononofu both stetical and user friendly