Since there is just my wife and I and occasionally 2 of our friends may visit the size is perfect.  And because the ground it will sit on is not level only a 3-leg table will work.  So it is perfect.  I used to draw installation drawings for assembling products for my company.  Your drawing looks like whoever drew it never put a table together.  Legs should go on first and then install the cross braces to the legs - one at a time.  I put it together by myself.  Maybe the artist had 3 monkeys to help him.