Is adding stars to stamina and focus really important?
It all depends on how you play the game. I personally don’t like to leave any categories left blank (no stars) because I’m sure I’ll find myself in a situation where I’ll need them. You will find the effects of stamina most noticeable during long rallies or long games – as the effectiveness and efficiency of your shots begin to deteriorate. Most people play a best of three game, three set match, so the effects of stamina should be minimized there. However, if you have a lengthy point take place, your shots may become weaker and weaker (and possibly miss their mark). The focus skill improves your ability to hit risk serves and risk shots. If you are very good at the using the risk meter with little to no focus for your custom player, then as far as I can tell, you should be okay without it. I may be proven wrong in the future though.