Hillary won this state by 15.71, so this is a swing of 6.29%. Kim Schrier's seat would go from a Clinton+3 (Tilt/Lean D) seat to a Biden+9.3 (Likely D) seat. Additionally, Jaime Herrera Beutler goes from a Trump+7.4 (Lean/Likely R) seat to a Trump +1.1 (Tossup/Tilt R) seat. Cathy McMorris Rogers' previously safe Trump+13.1 seat becomes a Lean/Likely R Trump+6.8 seat. So, the main implications here seem to be Schrier looks safe-ish, Beutler could be in real trouble, and Rogers could be vulnerable in a big wave.
It should be noted that the House PV margin in 2018 was more Democratic than this poll, and the Republican incumbents you listed held on by a fair bit (Beutler +5.4, Rodgers +9.5).
