You're right. Tomoko's obsession with Yuu is breaking up as she makes other friends, and the sexual pressure is apparently going away with it as she finds new friends to harass. Not that she'll ever stop wanting to cop a feel when she's close to Yuu.
I love how the artist draws eyes, especially for D.Va. The way her face scrunches up is adorable while her eyes are fierce. That size gap though, D. Va = One leg.