If you spend less than $6,500 per year then you are correct in that the Blue Cash would not be for you. We do not recommend the regular Blue card because the rewards are dismal:
Earn 1 point for every eligible dollar spent, 2X points when booking online travel through American Express, 3X points on Bonus Points Mall and up to 10x points with select partners.
You would be far better off with the American Express Blue Sky
which gives rewards that equals out to be 1.33% on your spending.
Please let me know if you have any questions about it!