I'm a couple of dozen episodes into Ultraseven now, and it's gotten fairly good. A lot of these Ultraman-franchise episodes are a lot more arty in their direction than the Toei stuff at the time, and the production values, while sometimes fairly crude (their rear-projection screen is almost as bad as the one in the Gamera movies), are often quite impressive.
Of course, the Ultra shows had to be done on a TV budget and schedule.
I find it strange, though, that Dan needs the Ultra Eye to transform. It makes sense for humans to need a special device to transform into an Ultra, but Ultraseven is Dan's natural form. If anything, he should need the device to change back into Dan.
Now, the real world reason for the Ultra Eye is, of course, for dramatic effect. As you have noted before, the plot of some episodes revolves around Dan not having immediate access to the Ultra Eye.
He does use the Ultra Eye to transform from Seven to Dan. It's simply invisible while he is in his Ultraseven form. The need for the Ultra Eye in-universe might be because of the limited time Ultraseven can stay within Earth's atmosphere.
Also, while this wasn't canon yet at the time the show aired, the Ultras are beings of light, so their physical Ultra form is not natural, either. When in their true form, the Ultras have been depicted as spheres of light.
Also... you know those Capsule Monsters that Dan carries on his belt and sometimes tosses out to fight for him? Were those... the first Pokemon?
You know, I've never thought of that before.
In "Gridman", Takeshi has a constant hate-boner for something to make him unleash a digital kaiju to damage it, and in this week's episode #29, it's dogs: