In my opinion, Head is one of the worst manufacturers right now. This is based on their overall products for the general market (not us neurotics TTWers) in my area over the last few years. They come up with good racquets once in awhile, but as a whole, they have been trending down.
1a. Too many lines with too many racquets racquets with too overlapping specs. There is not enough differentiation between the MPs from the Speed, Radical, Instinct, Extreme, now Gravity (as if they needed another racquet line).
1b. Inconsistent product lines i.e. the Pro model is too different from the MP which is too different from the S. Other companies typically maintain the same frame (pattern, headsize, beam), only varying weight, but Head likes to change a lot within the same line. This makes it harder to keep a player within same line as they grow older.
2. Polarizing paint colors and designs i.e. most people either like 'em or don't
3. The double shared hole grommets at the top used for a good amount of time. They caused strings to stick out beyond the bumperguard, leading to a lot of premature breakage if not carefully installed. Luckily they seem to be phasing these out now
4. Alienating their heritage player base. Radicals and Prestiges have moved very far from what they used to be. It's fine to trend towards stiffer, but why do it to two lines that have been very successful lines in the past? Let's not forget the great Radical Graphene bastardization...
5. Cheaper and flimsier grommets/bumperguards. To be fair, many manufacturers have been doing this, but taken within context to all the other trends, its becomes a weak point
6. Failure to sign exciting pros or market efficiently. Djokovic and Murray were at the top of their games for 2008-present, but the Speed and Radical lines never flew off the shelf like Aero/PD/Pure Strike/Blade/Prostaff (at least in my area). Lost Thiem to Babolat. Zverev doesn't sell and now is getting his own line? Sharapova doesn't sell anymore (hope they're not still paying her the big bucks). Cilic and Gasquet endorsing dying lines
7. 2 different grip shapes. This just adds to the lack of consistency across racquets