I don't think I would swap WFH for better pay unless it was a serious pay rise that would allow you to outsource quite a bit of housework.
We both work f/t, though different hours so we're not always both working the same 5 days a week which is a little easier. And the point people make about less mess when you're not in the house is very true.
Washing - gets shoved in the machine in the evening on the timer so it's finishing as we come home the next day, then hung out (am a slattern and it hangs outside overnight in the summer)
Washing up - do as much as you can as you go along. Often ours isn't done that evening, apart from the really smelly things, and is done early the next evening when someone is in with DD.
General cleaning - mostly done at the weekends. Not high standards
Dust and hoover downstairs every week, upstairs probably every fortnight unless something terrible happens in between. Remember, with people out a lot, there's less dirt on the floors etc. Dusting, wiping stains on walls and paintwork, that sort of 'general' cleaning can be done in tiny 2 min bursts - you'd be amazed how much you can get done if you run around like a blue-arsed fly for an episode of The Clangers.
Cooking - normally DH gets in before me to starts on dinner and finishes it while I do bathtime and bedtime. If he's not in then I'll make something quick and light for me or eat cereal. DD eats at nursery. Batch cook and freeze whenever possible. Just plan for quicker, easier meals if necessary, or ones that can cook themselves in the oven around DC bedtime.
If you get a serious pay rise, you can then look at getting a cleaner, getting the ironing done, that sort of thing. Or pay for a cleaner twice a week who also does the washing or something. Other than that you have to probably lower standards a little 
Exercise is the big one. In all honesty I don't know too many other working mums who manage a lot of exercise regularly, or they have downscaled it a lot. Because you're adding some of the cleaning, cooking etc time onto the end of your day with a commute then most people I know say that they don't have much energy to go for a run or to the gym very often. That doesn't mean you can't do it, of course, but completely anecdotally, with pretty much all of the mums I know their hobbies (exercise, classes, book groups etc) is the one thing that has slipped mostly.