Many of these features have now been added in Version 4.0.
1) Version 4.0 includes a completely new bridging algorithm that does a great job picking the best direction for the bridging fill. This will automatically choose the best direction for your bridges to make sure the infill has the best chance of success. This change is automatic, so it happens right away when you are using version 4.0.
2) If for some reason, you still want to try a different direction for your bridge, version 4.0 allows you to customize the direction that is used. Click "Edit Process Settings", go to the Other tab, and then enable the "Use fixed bridging infill angle" option and specify the angle that you want to use.
3) By default, the software uses the custom outline settings that you specify for the outlines of your model, however, version 4.0 includes a new option that allows you to override these settings for bridging regions if you wish. Click "Edit Process Settings", go to the Other tab, and enable the "Apply bridging settings to perimeters". When this option is enabled, any perimeters that are bridging across your model will use the custom bridging extrusion, speed, and fan speed settings that you have specified.