Yeah, I see what you're saying about the native viewers, I don't know what gay representation was like on Japanese TV in the 90s, (apart from Haruka and Michiru in Sailor Moon), so it might have been surprising then.
I actually asked what you meant, because your original comment sounded like you had a problem with two people of the same gender kissing. :/
Anyway, the Japanese Beast Wars Magazine seems to think it improved their relationship so,
Question: "If Tigatron and Airazor are both boys, how come they were flirting when the Aliens abducted them?"
Answer: "Even among humans there are boys who both love (like) each other. In the case of Tigatron and Airazor, they had been fighting together for a long time and as their emotions increased, their friendship turned to feelings of love. 'Transform', indeed!"