Not enough "eles" and "nos" conjugations
Most of the conjugations of this tense are for eu, ele, and voce. These all happen to be the same! Any chance of adding some for eles and nos?
And that's very important! In Portuguese the most important conjugations are for "eu, você/ele/ela/isso/a gente, nós, eles/elas" (just 4 conjugations!!=) But, if you use always "a gente" to mean "we", then you have just three!!