My 2 cents on BFA Frost Mage

[Frowsty-aggra-português]

This is my opinion as a PVE Mythic Raider playing Frost Mage since WoTLK.
Frost Mage in BFA is just a shadow of Legion Frost Mage, less FoF and BRain Freeze proc, a way WEAKER Icy Veins, a weaker Ebonbolt, and lots and lots of passives lost or made into talents.
Speaking of Talents:
15 row:

• Bone Chilling ( standard PVE choice);
• Lonely Winter (good talent weaker than Bone Chilling right now);
• Ice Nova ( stander PVP not used in PVE);

30 row:

• Glacial Insulation ( never used ) - 30’s row is a mobility row, and Glacial Insulation is out of place, frost needs other mobility choice, a Glacial Path or Bridge where the Mage can move faster for a limited time;
• Shimmer ( standard choice by far);
• Ice Floes ( can be used if Blink ever becomes needed otherwise Shimmer is always a go);

45 row:

• Incanter’s Flow (standard Frost Mage choice for a damage increase);
• Mirror Image ( weak talent) -remove it, change to where the images get FoF and Brain Freeze procs or make it baseline;
• Rune of Power ( As no place in Frost Mage talent tree, because Frost Mages have consistent damage and a burst window like the one the RoP provides will never be used if Frost Mage play style continuous to play like this;

60 row:

• Frozen touch ( always never used, was baseline with Legion Artifact);
• Chain Reaction ( Never used, scuffed Legion Legendary modified to become a talent, useless) - replace with the lvl.100 Ray of Frost( good damage, good FoF generator);
• Ebonbolt ( standard choice, weaker than Legions, be still good enough);

75 row:

• Friged Winds ( standard choice in raiding and mythic +);
• Ice Ward ( as no place in this tier) - replace with Deep Freeze(MoP version, Frost Mage needs a single target cc without being Polymorph, this is a cc row, you either choose bigger slows, a single target stun or a AoE polymorph, good balance);
• Ring of Frost( used in niche situations);

90 row:

• Freezing Rain( was baseline in Legion with the artifact) - Make Baseline, replace with a new AoE burst and slow spell like a Glacial Storm or something;
• Splitting Ice ( good tow target cleave talent);
• Comet Storm ( good Single target and burst AoE damage);

100 row:

• Thermal Void ( a bit weak, only because how weak is Icy Veins right now);
• Ray of Frost( good FoF generator, good damage) - move it to lvl.60 row;
• Glacial Spike( go to talent);

Frost Mage, needs the Elemental treatment, more damage on Frostbolt less damage on Glacial Spike.
I have playing a few MMO RPGs and I can say that in WOW have the worse Frost Mage fantasy of them all, I dont feel like I am playing a Mage that mastered the Cold, I feel like I am playing a proc game, I just spam Frostbolt 3/4k times in a raid night, zero class fantasy, that was fine until I faced Lady Jaina in BoD, in that moment I saw what a Frost Mage should be.

[Rezista-ravencrest (Rezista)]

I think Forst mage needs more of a - stop giving me procs and give me baseline spells that I can use to shatter. The whole idea of Frost is to be a combo spec - you chain spells together for fuge crits. It has been the case since TBC, but it is really frustrating when hitting x number frostbolt, sitting on 5 icycles waiting for a Brainfreeze that doesn’t proc, only to throw your GS infrustration and get 4 procs in 5 frostbolts, which you overwrite, because you didn’t want to take the gamble of not having Flurry for the next Glacial Spike.

One of the ways of fixing that gameplay issue is to make Brain freeze procs store, like Pyroclasm.
The other is to give Flurry CD of 20 seconds and it always shatters and remove the Brain Freeze proc from the game. Ebonbolt can reset the CD of Flurry in that case.