I dont agree that Ryan is blameless or a victim. He walked up to a woman about half his body weight who was holding washing, didnt even have her hands free, "play" punched, we see that did happen several times, the footage also isnt clear beyond that so we do not know how msny extra times his fists made contact with her body. By his iwn admission he had jewellry on his hand and caught her with this. This is the same guy who left the mother of his child when the baby was less than one because quote "she didnt do it for him". He comes off as a childish selfish thug who thinks its a laugh to knock a woman about for a joke then cries his eyes out at getting a reaction he didnt want. Ive seem the most pathetuc evidence used against Roxanne, like reference to a Rocky quote about resilience she had on her profile, some bland discussion with a z list presenter about ice skating etc. Im not defending her but the narratuve around this is franjly pathetic. If hes the father of smsll girl he should have more about him.
I don't particularly like Ryan Thomas all that much, but so many of his former colleagues have come out in support of him, saying how nice he is, how kind he is and how he wouldn't hurt a fly.
I think you have to put the whole boxing moves into context and that is that he wasn't play punching, he was shadow boxing. Many of them have been doing some boxing training to pass the time, including Roxanne herself. I also heard him say that all he could think of was that his ring may have made contact with her, but he clearly didn't intend to make contact and as she laughed afterwards he thought it may have caught her and possibly hurt a bit at the time, but at the time it didn't seem significant other than as a total accident.
Although you're right that we obviously haven't seen all the footage, Big Brother staff have. Do you seriously think they'd let him stay if he'd done as she accused and used her like a boxer uses a punch bag? 
Most of the 'evidence' against RP is far in excess of what you say here and includes a history of making allegations against various and numerous other colleagues and a history of walking out of shows including a stage production.
Ryan Thomas's former partner has now married and apparently he was invited to the wedding. She has also extended supportive views about him over this and so, although the breakdown of their relationship sounds bad, whatever caused it and the fallout seems to have been resolved by them, so that's good enough for me.