Highly recommend checking out the articles linked below. If we would just approach the army and make a serious offer/demands of what needs to be met, I have little doubt chareidim could serve and remain frum (at least those who were internally committed to Torah u’mitzvos before enlisting, maybe not those who were just going through motions/Orthoprax so as not to be ostracized by their families).
The reality has changed in many ways since the Chazon Ish gave his horaas sha’a.
On a related note, I’ve heard that they are now starting to build an entire base that would be charedi, no women, etc
Full disclosure: I also did Shlav Bet, and it was an incredible experience. If anyone is interested in hearing more about it/signing up, feel free to email [email protected]
https://iyun.org.il/en/sedersheni/haredi-idf-service-its-up-to-us/