With respect to the proton pack itself, my guess (and it's just a guess) is that the stove top thing isn't actually meant to be a stove top thing. It's just part of the pack. If it is, I would fully expect it to be used in a subversive way.
The heart thing...eh...for me it just raises an eyebrow. It could go either way, but it strikes me as, I dunno, needless. It could be pandering, it could be sexist itself, or it could be a character accent. Like, you have a scientist who's into "spores, molds, an fungi," but who also likes Hello Kitty or something, and the point is the contrasts in the character. Orrrr it could just be used as a one-off sight-gag, like they put on their packs in the typical "Rambo gears up" fashion, and one shot is of the heart because...women! Or something. I dunno.
For me, the issue with this ties back to the problems I have with the development of this film. With a project like this, there's a constant tension between emphasizing the "it's women!" aspect, and just telling a good/funny story that focuses on women. Feig himself may be terrific at doing the latter, but much of the development and pre-release hype efforts seem focused on the former. It's that approach that irritates me because it suggests to me that the studio is more concerned with wooing a demographic bloc than with telling a good story. Feig may tell a good story regardless (although it won't be one that respects or includes the pre-existing continuity, which is a shame because I think there's more story to be told in that universe), but as I've said throughout, if that happens, if this film turns out to be great, it will be in spite of the process by which it came to be, rather than because of it. More likely, I think, is that we'll see a film that's a by-the-numbers Paul Feig comedy which happens to have a "Ghostbusters" veneer, but otherwise is pretty much just his usual cast of actors doing their usual thing.
And to be clear, when, back in the early 2000s, people were saying "Oh, get Seth Rogen and Judd Apatow to do this!" I would've had similar issues -- that's just unimaginative people taking whatever is currently popular/making money and slapping the brand onto that style of film, instead of using what made the brand worth anything in the first place as a basis for future storytelling.