Fenix 5S/5 - 9.53 Beta Release

Am I right that you can only have GPS+GLONASS or GPS+Galileo, there's no option for all three?

So far I guess not, the plus watches also only can have 2 at the same time. I'm wondering if a GLONASS+Galileo option would make sense, if the watch can only handle 2 at the same time.

Could you please she some test ,compare new configuration gps+ glonnas Vs gps + Galileo.
it is big differences?

I'm a F5 users since a couple of weeks, coming from a VAHR, and upgraded to this beta without issues. This morning I had a 50km MTB ride with lots of curvy single tracks and 90% under trees, so a good test case I think. My F5 was on GPS+Galileo and took my Oregon 600 as well with me with GPS+Glonass. At the end the F5 showed 50,0 km with recorded 8584 points and O600 showed 47,1 km with 2445 points. I compared the 2 tracks on the map in basecamp and the track from F5 followed the paths on the map way much better then the O600. So far no complaints from me regarding GPS accuracy. Next time I will compare the GPS and GPS+Glonass for the same route again.
In the 2:40 h ride the battery dropped from 57% to 40%, but that is including speed, cadence and HR sensors as well.

not saying that this is necessarily beta related, but i would like to ask if someone else noticed something like this as well.

i installed the beta late in the evening and the next morning the training load had dropped significantly. i did not train less in time, distance and intensity - i would say i did train a little harder than the weeks before - but the training load dropped from 380 to 140. maybe this is just some special calculation from firstbeat...?

not saying that this is necessarily beta related, but i would like to ask if someone else noticed something like this as well.

i installed the beta late in the evening and the next morning the training load had dropped significantly. i did not train less in time, distance and intensity - i would say i did train a little harder than the weeks before - but the training load dropped from 380 to 140. maybe this is just some special calculation from firstbeat...?

My TL has decreased but my load has decreased, in a way that seems believable. May take a week to see if it seems right

Is it just me or the HR reading is a little unstable with this beta release? It fluctuates more than with the 9.20 and goes a little higher than usual. I' ve installed it just a couple of hours ago, but I'm starting to regret doing it.

Not here. Not noticed any change to HR

Hr is fine here, too.
Lactate threshold is still not updating and stucked at an not possible value of 46 (it says that it was entered manually but it was not).

Only Galileo would be good to see how it works. He proposes to add them in some beta version in order to check and listen to the opinion of beta testers.