Approved I-140 in EB1c, Any issue in H1B extension?

My H1B visa is getting expired on 10-Jan-2020 and have maxout Dec-2021.

I have approved I-140 (EB1C) received date: May-2019. Priority Date: Feb-2018.

My employer is not filing my extension, Since my EB1 I-140 approved under the SOC category 11-3021.
1. Will there be any risk on I-140, if i apply H1B extension?
2. What are the options to keep my I-140 and continue here in USA?
3. How about converting my H1B to L1-A or L1-B visa?
4. Is it possible to change from EB1 to EB2. Is it a good choice?
5. Any possibility of getting EB1c come to current by October 2019? If it come, any option to file I-485 in premium?
6. Keeping I-140 approval, can I apply I-485 staying outside USA (Consular Processing)?