So I have switched to Clover (for the Trackpad sake) and created my own patches for the Trackpad and it works perfectly now! VoodooI2C is now able to detect my Trackpad, its pinning and now works under Interrupt mode, rendering a more stable experience (see screenshots below). The laggy cursor bug I mentioned above occurs very slightly to me now, although all 2-finger gestures (like zoom, rotate) are still a hit-or-miss to me: they basically work, but not smooth. Also I have the same Trackpad as yours (Dell 081C) and my BIOS version is 1.13.1 (Downgraded from v1.14 because of undervolting issue).
Here's my theory for the Trackpad bug under OpenCore (I'm assuming you're using SSDT patches and not directly edit and compile your DSDT): those SSDT Trackpad patches are used to patch _STA and _CRS methods found under GPI0 and TPD1 respectively. In order for those patches to work we need to rename (or to hotpatch, under ACPI -> Patches in OC config.plist) those methods so that our patched one won't be overridden by the DSDT, and there are plenty of _STAs and _CRSs in our DSDT, so we need to rename them in some specific scopes (in this case, under _SB.PCI0.GPI0 and _SB.PCI0.I2C1.TPD1 scope). In Clover this should be easy to do: just find _STA and _CRS and replace with XSTA and XCRS with their relative target bridge (GPI0 and TPD1 respectively) and we're good to go! But under OpenCore, I can still find and replace those methods, but there are no target bridges to aim for (not that I know of), so VoodooI2C won't detect our Trackpad and it has to work under Polling mode (assume that you have renamed _OSI to XOSI). However, if we edit directly to our DSDTs instead (force those methods to return specific values instead of those ifs statements that will lead to different return values), we don't have to do those SSDT patches and hotpatches anymore. I haven't tried this because my decompiled DSDT won't compile properly due to some random errors (I'll try to fix them), so if you're able to, maybe edit your DSDT instead?
Aside from that trackpad woes, I haven't replaced my internal wifi card (still using Intel Dual-band Wireless AC 8265, can't find replacement card for hackintosh in my area) so I use the Ethernet port for internet in macOS. Also, does the right side of your palmrest heat up while using macOS? That doesn't happen under Windows though, and I'm a bit worried because that's the left side of the battery, and battery + heat = bad :).
