I love Star Wars - the basic premise of an epic universe, battle of good vs evil, classic take on characters and their traits and promoting clean and pure values...Most of us love (or have loved) Star Wars for those reasons.
Now, do you think kids and younger teenagers will want to watch 30 year old movies and will be susceptible to the story and its values despite the "prehistoric" graphics and effects? Unfortunately, most of them won't be attracted and will watch it if you make them and look at it through that lens to some extent - and that is reality.
So if you look at "Rebels" as a new branch in that universe, fresh content promoting the same types of characters, similar story lines and the same values - can it not be only positive that it exists? To attract today's kids and to provide content of this kind to them, instead of them watching Game of Thrones, Dexter and alike?
I understand that, as a die-hard Star Wars fan of 30 or 40, you can disprove the lack of originality, the relative crudeness of animation and what not - but, hey - this is Star Wars, just the same as it always has been - if you loved it before, there is no reason to hate it now, in this form.
So I would understand reviews of 6+, but 1? That's just lame.
As a 31 year old, I found it interesting and entertaining and a nice watch. Worth my time and certainly worth your kid's time. Of course, some criticism stands - i.e. recycling Alladin and alike - but we have new SW content for new generations and it's good.
