Trying to Match Performance & Results in v1.2

[Spectralis]

I've just updated to plugin v1.2. I'm having trouble matching performance in this version with the older version (pre v1.2) of the plugin. For example,

1. When rendering indoor scenes the daylight lighting has a slightly yellowish tint no matter how much I adjust the colours. With the previous version I was able to produce a much more blue tint. I'm trying to emulate colder and bluer fluorescent lighting.

2. The materials in v1.2 produce a slightly softer and less defined look to the scene compared to the previous version which seemed slightly sharper. I'm not talking about camera focus here but how the objects look in a scene.

3. My render times have increased by at least a third. An animation that took about 9 hours to render in the previous version of the plugin now takes about 13 hours in v1.2. The render settings appear to be the same although there are now some extra settings that I'm not sure about so maybe they need to be optimised.

Has anyone else experienced this and is there a fix? I've read the Octane Manual but it's v1.5 and the interface is different to the DAZ plugin so it didn't really make things clearer. Is there a DAZ plugin manual?