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Forsythia has already made the blooms for next spring. Any pruning now will remove blooms but that is your decision. Most folks prune forsythia right after it blooms, removing the oldest stems to the ground. About 1/3 of the stems should be pruned out annually. That may seem drastic but the shrub responds with new growth that grows 5+ feet in a season. And new growth yields more blooms than old wood. It's natural shape is like a fountain; tall stems that eventually arch over to the ground. If your shrub is in a place that doesn't have enough room for the natural state, you can prune it into whatever shape you like. For the largest number of blooms, still remove 1/3 of the oldest stems to the ground annually. If you follow the 1/3 rule, you may find that the overall size works in its current location. Also consider hybrid forsythias that don't grow so tall. Fall is a great planting time for shrubs if you want to make a change.

Forsythia requires at least 4 hours of direct sunlight to bloom but full sun, 6+ hours, leads to heavier blooming. It has been a garden staple for so long that there are many hybrids of different sizes. Therefore, go with instructions on the plant tag. You want to leave room between plants so they can take their natural arching form. That may mean 6 feet apart unless you are using them as a hedge. After blooming, remove 1/3 of the branches to the ground annually starting next year. Remove the largest stems first. Forsythia blooms better on young wood; by removing thick, old branches you are allowing fresh growth to thrive. Flower buds are made the previous year in late summer and fall; therefore, pruning must be done before July 4. Where branch tips touch the ground, roots develop and start a new bush. To prevent crowding, these should be removed or transplanted. The following article has more care details.
https://www.gardeningknowhow.com/ornamental/shrubs/forsythia/forsythia-shrub-care.htm

Here are some articles that will help you!

https://www.gardeningknowhow.com/ornamental/shrubs/forsythia/forsythia-rejuvenation.htm
https://www.gardeningknowhow.com/ornamental/shrubs/forsythia/forsythia-shrub-care.htm
https://www.gardeningknowhow.com/edible/fruits/blueberries/blueberry-plant-pruning.htm
https://www.gardeningknowhow.com/edible/fruits/blueberries/growing-blueberry.htm

It is not edible in the sense that it should be part of a diet... It is edible in the fact that it should be used sparingly as a medication.

A yearly trim will keep their growth in check, but wait till after they bloom in spring to prune them. They bloom on old wood so trimming any later will reduce or eliminate the next year's blooms.

https://www.gardeningknowhow.com/ornamental/shrubs/forsythia/forsythia-pruning.htm

Ultimately, this will be up to you. You could replace it with anything that will do well in your zone.

This article will offer suggestions:

https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-7/zone-7-bushes.htm