Absolutely feel free to adjust the salt on this to your taste and nutritional need during exercise. Example, I may add less during colder weather when I sweat less.
In addition to orange juice, I have made this with pineapple juice and fresh pink grapefruit juice. All have tasted great to me.
If this is too acidic, cut some or all of the lemon juice first, then add more orange juice.
For a vegan option, replace the honey with agave nectar.