Regarding how Ultraseve fought with Star Bem Gyeron, while how Ultraseven dealt with the kaiju could make the fight look unfair in a way, what comes to my mind is the description made by Akio Jissoji in one of his books titled “Ultraman Tanjō/The Birth of Ultraman” published by Chikuma Shobō in 2006.
In that book, Jissoji says everything was left to the tokusatsu staff to make the tokusatsu part of the show filmed at their discretion for the series. And it was not a rarity that the details of fight scene between Ultra heroes and a kaiju character/characters were just left out in the script only with the description indicating it is the tokusatsu scene with an arrow like → and the word “tokusatsu yoroshiku.”
“Yoroshiku” should mean “thank you in advance” in this case while the expression is often found to be used in conversations among Japanese people in various meanings such as when greeting someone or asking others for something. So the description in the script represents “leaving it to the tokusatsu staff, thank you in advance.”
As the result, I assume there could have been cases where what happened in the tokusatsu part ended up slightly mismatching the theme of the episode.
As to the effort paid by the tokusatus staff for the tokusatus parts, in the book authored by Jissoji, he refers to the statement made by Koichi Takano, tokusatsu director, as Takano put it as below:
“Although we made efforts to work out something new each time, pressed by the deadline for broadcasting, it was only natural we couldn’t work on something that would require a lot of extra work afterwards (probably optical compositing, etc.). We had to give up on things that would require a lot of preparation and an elaborate set even though we wanted to do it.
“Fight scenes with kaijus were no exception. While there were many things we would rather do such as filming in different sets, devising the use of gunpowder or the expression of beams/rays, and increasing composited images, we couldn’t make it due to time and money. So, as the last-ditch effort or the most straightforward means, it unintentionally ended up having Ultraman and a kaiju perform professional wrestling pretend play frequently.”