Its a great news...
I was thinking today what you said about moving translate and making an options for translate in comments etc... and then I realised that most of the people will translate the whole topic in most of the cases, so it is a good move to make this optional for admins to choose from. However, If admin will choose, as an example-"translate topic only", then it need to be clearly visible ( but not aggressively) button to interact with users. I will run a poll on my forum, usually 50 members are active and we will see what they prefer...