Yes. HE in general didnt do so well with the rules change - their defense was that ASF meant you had not enemies to attack you back. With supporting attacks, that is no longer true. The phoenix guard didnt change - they are still a very reliable unit that will survive most things thrown at them.
Sorry, but I completely disagree with this. Wood elves got shafted for example
ASF with greatswords? Usually re-rolling hits, wounding on 3's or 2's. 2 attacks front rank with 1 from the rank behind. That's not shafted in any way. So you can't charge them into the front of a hoard. That makes sense as opposed to being nerfed.
Whitelions are also pretty brutal with the ASF rules. HE spearmen are exceptionally capable of retaining a full number of ASF attacks that often re-roll misses regardless of the casualties they take so long as you have a reasonable bock of them.
Dragon's are brutal when used correctly, Eagles can be used very effectively against machines, skirmishers and even as supporting flankers due to the stomp rules.
High magic is brutal, with easy to cast spells under the new regieme and drain magic being such a useful spell. Flames of the Phoenix is also very very capable due to the changes in always remains in play.
Phoenix guard are dark horses in this edition.
Attacks back needn't be as bad as people are thinking, hit the enemy in the flank to deny supporting/hoard attacks. Coupled with your high number of kills compared to relatively few casualties, bonus for charging you will win the first round. 2nd round throw another unit into the other flank or the front to finish the main unit off.
You have to use the smaller elite units to isolate and destroy elements. HE play the same but are outrageously offensive when used correctly. Powerful magic backs them up and should a gunline threaten them there are steps you can take through magical support, flying heroes, great eagles, fast cavalry to enable your main units to close.