In terms of story, there is little to none given the nature of the show but by the end of the series I think the viewer can get a sense of how a narrative involving Ekoda-chan would play out, seeing that there were characters, topics and themes that would repeatedly appear throughout the skits.
As for the art, animation and sound, those are all down to the discretion of the directors and hence the perceived quality of these aspects may change from episode to episode. For me personally, it's always exciting for me to anticipate how each director would interpret the source material. Overall I think a good job was done with the art and sound.
Where there was a lot of variation with the art and sound, in terms of the character of Ekoda-chan herself, the essense of what composes that character remained more or less the same throughout the series. In this instance that's a positive since what's going on from skit to skit would vary it's nice that there is something for the audience to connect with in the form of the main character.
One thing that has to be mentioned is that although Rinshi!! Ekoda-chan is a short with a duration of 3 minutes, there is an interview portion that goes on for the remaining 20 minutes of the run time. That may be interesting or not to look at depending on the individual and it's something that I think could be skipped if it doesn't interest you.
Overall I think Rinshi!! Ekoda-chan was a decent watch although I don't know it's something I could easily recommend to someone to check out.
