As far as the stylization of the characters. Yes, the animated series is canon in the storyline. The appearances were designed to bring new life to the look of Star Wars and appeal to children. There is a considered difference in animated and non animated characters. The reveal of a character from the animated series does not neccessarily mean that's the character's real world appearance. For example, we all know the story of the prequels and know the animated series falls somewhere between AOTC and ROTS. THe story is a canon continuation of the events. However, are we to believe that Anakin, Obi Wan and the rest transformed from flesh and blood to digital animation and back? No, the story holds true it's just told in a different medium.
That into account, the costume would be accurate if made in real world style armor OR in animated style. Just as we've seen costumers do Rex and the Clones in both styles.
As for no RF, doesn't bother me much at all. My custom didn't have one fo rthe longest time and now that Ive added one, it's NOT traditional Fett style. I don't think every single Mandalorian in the galaxy has to be a matching repaint of Boba and Jango. I love the diversity. It's what attracted me to the Mandalorian Mercs Costuming Club over the others when I started into costuming. It's the opportunity to play out as a Star Wars character a be in universe but, to have your own control over the look of you character.
Although the 4 seen look like Jango with minimum mods, I applaud the creators for stepping outside the box in a few small ways.